Laser pointer discussion. Read/write reviews of laser pointers and laser pointer companies. Learn about all types of laser pointers and lasers





One laser store meets all your needs

Go Back   Laser Pointer Forums - Discuss Laser Pointers > Lasers > Experiments & Modifications





Reply
 
LinkBack Thread Tools Display Modes
Old 11-26-2015, 10:48 PM #1
Down with Umbrella's Avatar
Class 2M Laser
 
Join Date: Aug 2013
Location: Kennebunk, Maine
Posts: 966
Rep Power: 2993
Down with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond repute
Down with Umbrella Down with Umbrella is offline
Class 2M Laser
Down with Umbrella's Avatar
 
Join Date: Aug 2013
Location: Kennebunk, Maine
Posts: 966
Rep Power: 2993
Down with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond repute
Default Super "chilled" ethanol Cooling system for NUBM44. Pic Heavy

Preface

This experiment/build has evolved and evolved over time in many different directions. First the idea of the host, I welded it at work on lunchbreak, then I moved onto the batteries and driver. The next and final step was cooling this system. I have no formal experience here but I am always willing to experiment and learn In this thread I will discuss:
-the build of the host
-My choice for ethanol
-The coolent system a trial run for a wavelength Shift in a future build.
I did this with limited means so it's more of a proof of concept theory not a true experiment like I wanted to do. I would need:
-an Ophir head to measure wattage and plot values over time.
-A spectrometer to measure WL shift.
-the proper thermometer to measure sub zero temperature!




Here is where I will start!
While NOT technically considered "super cooling" as that would imply I altered the nucleus of a Crystaline structure of a liquid to prevent the transition into a solid. I did cool down liquid ethanol to approximately -60C(-75F) via MULTIPLE dry ice baths in a 2000mL flask. (I say approx. because my thermocoupling died. And a regular thermometer bottoms out at -20c) the ambient temperature was 3C. I picked up 10 LBS at the super market and started dumping ice in the flask. 100 grams at a time. Dry icy expands very rapidly especially in an ethanol bath. 100grams at a time was a good way of maintaining pressure and temperature. I pre-cooled the ethanol before hooking up the laser's coil because the dry ice to tepid ethanol is quite violent. I prefer pellet type dry ice but what I got were solid blocks I had to smash with a hammer.



The only thermometer I have tapped out. And broke as well...
INSULATED GLOVES ARE A REQUIREMENT WHEN HANDING COOLED ETHANOL


Host construction
Without the coolent system it's actually portable!
I welded schd 10 stainless pipe rings 1.5"rings and 2" rings to sandwich 6 1/8th inch SS tubes.
Well, it was kinda like building a ship in a bottle until I cut one of the tubes. There is a small stainless wire the slides up and down. As long as there is tension on the tubing the "Pin" will always stay in place. (See photo below regarding this pin) the benefit here is the host can be worked on and I can swap diode modules.


One purpose of this experiment was to cool a powerful laser head that has a copper core, aluminum body and copper tubing coiled around the body with a thermal paste to increase conductivity. The module itself was custom made by Ehgimus! Thank you friend


Battery tube- 3/4in copper tube with male threads for a brass cap. This holds the negative spring and at the top is the positive battery contact. Very low resistance here.


Working at the bar literally? Am I the only one who has a work space like this?
I have the HeNes in the back for encouragement.


The internals
Two switches a momentary and a toggle on/off. The on/off has a protective covering when I actually start lasing.
Buck driver set to 5amps
G2 lense
2x 18650 LG he2 batteries. 26650 would have been ideal but I didn't actually have two on hand.
Looking back I would have built this with bigger batteries...no brainier.


The bypass.


With the host complete its time to address cooling this beast.
Where was I?

Cooling
What's your first choice if you wanted to cyro cool a laser. Liquid nitrogen.
I have access to liquid nitrogen and argon at work but what I don't have is a vacuum flask to transport this. Anddd I'm not about to put this in a pop bottle so I had to explore cheap options that were available to me.
Dry ice and ethanol.
Dry ice was used because its temperature where it sublimates is -78.5C
Ethanol was used because of its extremely low freezing point. -114C.
I estimate the efficiency to be close to 80% regarding the solid CO2 to the ethanol which maybe a little generous.
Therefore there is no way the alcohol could freeze and it would maintain its viscosity.
Pumping the ethanol through the coil was tricky because most mechanical pumps would freeze up so I sealed the flask and allowed the sublimating solid CO2 to build pressure forcing the cold ethanol through the stem into the coil. I control the pressure from a valve on the flask which controlled the flow rate. safety glasses were a requirement because the flask could have blown up!! This is a noncyclical system. The spent ethanol was discharged into the reservoir then back into the main flask(here vv)with 100g of additional dry ice.

(Interesting note: ethanol's PH is just a hair over 7. [7.33 to be exact.] After all the dry ice the carbonated ethanol measured a ph of 5.5. from slightly basic to acidic!)

To be honest I wasn't sure what would happen. I'm Familar with how steam expands and contracts but never low low temps.
The coil
In this photo there are two different colored arrows. The black and magenta arrows show solid arctic alumina epoxy. Those two points are fixed. The blue arrows denote "loose" coiling; this allows for expansion and contraction when the laser module cools/warms arctic silver 5 grease was used here to maintain conduction.
The circle shows where I actually epoxied an AL heat sink for the driver! I'd say it's working!
Important note: moisture here on the driver was a concern. I used canned air to blow away any accumulation.
The brass tubing connectors were ditched. Hose and hose clamps worked perfect because there was no real pressure...



Up and running- OD 5+ glasses used here. I set the valve to a trickle and made various notes and photos.
Hmm something I did not account for, condensation on the optics. I didn't notice any difference in beam profile but in the future it might need to be considered. The ambient room temperature was a chilly 3C so that might have helped.




Let's get to some beam shots.




Conclusion.
Well folks it's been a fun build. 6 weeks id say working on it on and off.
Was I successful? I'd say the system worked, there were some things that I would have measured if I could have but I lack the tools. For now I will be happy with this..
I have read blue doesn't shift like the red 638s and that will be what I will try next . What did the color look like? Kinda hard to judge because you shouldn't be looking at 7 possible watts! However with the diode being pushed it's likely that it only shifted back to 445 and that's what it appeared to be.
Maybe a mit 500 will be a better choice and if you toast it It's not a pricy.

If you have read this far down appreciate your time. Comments, concerns, constructive criticism always welcome.
Jefferson


__________________
"Rosemary had an accident." TDWP


Last edited by Down with Umbrella; 11-27-2015 at 02:14 AM.
Down with Umbrella is offline   Reply With Quote


















Old 11-27-2015, 12:44 AM #2
Alaskan's Avatar
Class 4 Laser
 
Join Date: Jan 2014
Location: Currently in Iraq.
Posts: 7,556
Rep Power: 88060
Alaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond repute
Alaskan Alaskan is offline
Class 4 Laser
Alaskan's Avatar
 
Join Date: Jan 2014
Location: Currently in Iraq.
Posts: 7,556
Rep Power: 88060
Alaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond repute
Default Re: Super "chilled" ethanol Cooling system for NUBM44. Pic Heavy

Nice work, I really like the way you put things together, looks very classy! Well worthy of the +rep I just give, outstanding. Wish you had a meter to measure the wavelength running at low to full power output.
__________________

The forum costs more to run than donations received, if you wish to help click this link: http://laserpointerforums.com/donations.htm

Laser Safety: http://www.laserpointersafety.com/index.html

Sam's Laser FAQ: Sam's Laser FAQ: Welcome Page

RHD's Relative Perceived Brightness Calculator. Compare brightness @nm: http://lsrtools.1apps.com/relativebrightness

To shorten my signature I have moved most of my laser related web links to this forum page, the second post in that thread shows most of my builds... Alaskan's Laser Links: http://laserpointerforums.com/f44/al...ml#post1449395


Sincerely investigate any of these three short quotes as new concepts and you've taken your first step into a larger world:

"I regard consciousness as fundamental. I regard matter as derivative from consciousness..." - Max Planck. "Everything we call real is made of things that cannot be regarded as real" - Neils Bohr. "What we call physical things and events do not exist independently of subjective experience..." - Deepak Chopra.

Each of these three rabbit holes go deep, ending up in the same place.

Useless troll fighting.
.........................
PhotoB****t high jacking you too? Use this link instead:
http://imgbb.com

High resolution of my avatar: https://ibb.co/fWOhXF
Alaskan is offline   Reply With Quote
Old 11-27-2015, 01:13 AM #3
Benm's Avatar
Class 4 Laser
 
Join Date: Aug 2007
Location: Netherlands
Posts: 7,495
Rep Power: 29264
Benm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond repute
Benm Benm is online now
Class 4 Laser
Benm's Avatar
 
Join Date: Aug 2007
Location: Netherlands
Posts: 7,495
Rep Power: 29264
Benm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond repute
Default Re: Super "chilled" ethanol Cooling system for NUBM44. Pic Heavy

I'd say keep researching it further

Dry ice and ethanol mixtures are a well documented lab method of cooling this rapidly. Since you don't get the leidenfrost effect it is actually superior in cooling speed compared to liquid nitrogren an such, and used for biological samples needing very rapid cooling.

As for the effects on this temperature on lasers, i'd be interested to see results in wavelength and power variation for a given current.

For the method used i'm not really sure you would need to make a cooler like that. Perhaps it would be easier to submerge the laser diode and optics in the cold ethanol since it's not that conductive to electricity.

And as a word of warning to others that want to try this: dry iced cooled ethanol is FAR more dangerous to work with than liquid nitrogen. It doesn't bubble away when you get it on you, but at that temperature is a very viscous liquid (somewhat like motor oil at room temp) that sticks to virtually anything. This is a great property if you're looking for rapid cooling, but also very dangerous. While you can just pour some liquid nitrogen on your hand and bush it off, this stuff sticks like napalm and will cause severe freeze burns that will not heal quickly because the remaining ethanol will kill live cells ones the injury warms back up to body temperature.

Last edited by Benm; 11-27-2015 at 01:14 AM.
Benm is online now   Reply With Quote
Old 11-27-2015, 01:40 AM #4
Thejoker301's Avatar
Class 3R Laser
 
Join Date: Mar 2012
Posts: 1,321
Rep Power: 0
Thejoker301 is infamous around these partsThejoker301 is infamous around these partsThejoker301 is infamous around these partsThejoker301 is infamous around these partsThejoker301 is infamous around these partsThejoker301 is infamous around these partsThejoker301 is infamous around these partsThejoker301 is infamous around these partsThejoker301 is infamous around these partsThejoker301 is infamous around these partsThejoker301 is infamous around these parts
Thejoker301 Thejoker301 is offline
Class 3R Laser
Thejoker301's Avatar
 
Join Date: Mar 2012
Posts: 1,321
Rep Power: 0
Thejoker301 is infamous around these partsThejoker301 is infamous around these partsThejoker301 is infamous around these partsThejoker301 is infamous around these partsThejoker301 is infamous around these partsThejoker301 is infamous around these partsThejoker301 is infamous around these partsThejoker301 is infamous around these partsThejoker301 is infamous around these partsThejoker301 is infamous around these partsThejoker301 is infamous around these parts
Default Re: Super "chilled" ethanol Cooling system for NUBM44. Pic Heavy

Very nice to see how you put it all toghether. Creative idea

Like said above would really like to know the wavelength of this beast
__________________
My Builds and Lasers Reviews :

445nm : Arcane 3W+ , MSV3 2.2W , Mirror Polsihed 2.2W C6 , 2.2W Polished C8 , 2W + Polished guidesmans
532nm : SFPL-400 review , SFAG-300 review
635nm : 960mW Mirror Polished SF501B

LPMs - 5W Laserbee Ophir LPM , 2.5W USB Laserbee , Radiant X4 3.7W




Thejoker301 is offline   Reply With Quote
Old 11-27-2015, 02:14 AM #5
crazyspaz's Avatar
Class 3B Laser
 
Join Date: Jul 2012
Location: IN, United States
Posts: 2,863
Rep Power: 1995
crazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond repute
crazyspaz crazyspaz is offline
Class 3B Laser
crazyspaz's Avatar
 
Join Date: Jul 2012
Location: IN, United States
Posts: 2,863
Rep Power: 1995
crazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond repute
Default Re: Super "chilled" ethanol Cooling system for NUBM44. Pic Heavy

Ooh, the mod master speaks again I agree, throwing a p73 would give much more exciting results. I wonder how low you could shift the wavelength?

Last edited by crazyspaz; 11-27-2015 at 05:31 AM.
crazyspaz is offline   Reply With Quote
Old 11-27-2015, 02:54 AM #6
Down with Umbrella's Avatar
Class 2M Laser
 
Join Date: Aug 2013
Location: Kennebunk, Maine
Posts: 966
Rep Power: 2993
Down with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond repute
Down with Umbrella Down with Umbrella is offline
Class 2M Laser
Down with Umbrella's Avatar
 
Join Date: Aug 2013
Location: Kennebunk, Maine
Posts: 966
Rep Power: 2993
Down with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond repute
Default Re: Super "chilled" ethanol Cooling system for NUBM44. Pic Heavy

Thanks guys! Benm, I updated the OP. That was something I should have included in the post. +rep When I can. I had Tillman leather gloves with a thick layer of insulation.
My skin never came in contact with the ethanol so that was good.

Yup, I pretty much have to go red hopefully orange I should say. If I did that I could use my radiant X4 and the wavelength would be noticeable in a side by side comparison.
__________________
"Rosemary had an accident." TDWP


Last edited by Down with Umbrella; 11-27-2015 at 03:04 AM.
Down with Umbrella is offline   Reply With Quote
Old 11-27-2015, 06:42 AM #7
RedCowboy's Avatar
Class 3B Laser
 
Join Date: Jul 2015
Location: Suburbs of Atlanta Georgia
Posts: 4,896
Rep Power: 66927
RedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond repute
RedCowboy RedCowboy is online now
Class 3B Laser
RedCowboy's Avatar
 
Join Date: Jul 2015
Location: Suburbs of Atlanta Georgia
Posts: 4,896
Rep Power: 66927
RedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond repute
Default Re: Super "chilled" ethanol Cooling system for NUBM44. Pic Heavy

Very cool, literally.
__________________
You can not put freedom in a bag.
It is in fact an abstract concept.
Yet it is the single most valuable thing anyone has ever had.
RedCowboy is online now   Reply With Quote
Old 11-27-2015, 02:28 PM #8
CDBEAM777's Avatar
Class 2M Laser
 
Join Date: Feb 2010
Posts: 898
Rep Power: 22102
CDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond repute
CDBEAM777 CDBEAM777 is online now
Class 2M Laser
CDBEAM777's Avatar
 
Join Date: Feb 2010
Posts: 898
Rep Power: 22102
CDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond repute
Default Re: Super "chilled" ethanol Cooling system for NUBM44. Pic Heavy

WOW...now this is a cool thread !!! Remember..." Ice is Nice "....another famous Laser Scientist/Actor once said !! Thanx for the education/teaching ! See the attached pic...."you've earned it"
Beam Out...
Attached Thumbnails
Super "chilled" ethanol Cooling system for NUBM44. Pic Heavy-mad-scientist-dwu10.jpg  
__________________
Lite'em Up CDBEAM=======>...and....
"Robby...Where have you been? I've beamed and beamed "

Solar Prominence-Laser Lumia combined with audio http://laserpointerforums.com/f47/laser-lumia-terrawatt-labs-97261.html
CYAN CANNON V BUILD-Green + Blue = Photon Cannon - Build resumed http://laserpointerforums.com/f49/cy...ild-94999.html
Titanium Cyprus TRI EDC with 520 nm and GITD Europium barrel rings-Completed http://laserpointerforums.com/f45/my...t-94978-2.html
TRIDENTIS BUILD-Three (3) 445 Combiner-Knife edge-Completed http://laserpointerforums.com/f65/tr...uty-83781.html
DRAGON'S HEAD BUILD-Optically corrected P73-Completed http://laserpointerforums.com/f50/no...ign-87235.html
Purple pHAZE Combiner - Red + Blue = Purple-Completed http://laserpointerforums.com/f42/pu...ple-93717.html
Sky Blue Ramjet-Corrected NUBMO7E- Completed http://laserpointerforums.com/f42/sk...ild-94646.html
Check out http://www.hobbylasers.com/
CDBEAM777 is online now   Reply With Quote
Old 11-28-2015, 12:26 AM #9
Down with Umbrella's Avatar
Class 2M Laser
 
Join Date: Aug 2013
Location: Kennebunk, Maine
Posts: 966
Rep Power: 2993
Down with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond repute
Down with Umbrella Down with Umbrella is offline
Class 2M Laser
Down with Umbrella's Avatar
 
Join Date: Aug 2013
Location: Kennebunk, Maine
Posts: 966
Rep Power: 2993
Down with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond repute
Default Re: Super "chilled" ethanol Cooling system for NUBM44. Pic Heavy

Hahaha that's awesome cdbeamz. I'm saving that.
What is the poll? Oclaro 700 or a mit P73. Setting the diode at a more conservative amperage would be more app to shift I would think. Also if I'm not mistaken these diodes are open can. I wonder if the cooling would damage the diode even if the module is sealed. I've kill one in the past.
Down with Umbrella is offline   Reply With Quote
Old 11-28-2015, 01:13 AM #10
Benm's Avatar
Class 4 Laser
 
Join Date: Aug 2007
Location: Netherlands
Posts: 7,495
Rep Power: 29264
Benm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond repute
Benm Benm is online now
Class 4 Laser
Benm's Avatar
 
Join Date: Aug 2007
Location: Netherlands
Posts: 7,495
Rep Power: 29264
Benm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond repute
Default Re: Super "chilled" ethanol Cooling system for NUBM44. Pic Heavy

I don't think submersion in ethanol would kill a diode, open can or otherwise, as long as you allow it to change temperature gradually. Dropping one at room temperature into the cold ethanol could cause cracks and such because of the very sudden 100K temperature jump. This could be a problem for the window of a canned diode, but also for the die on either type.

One problem with open can diodes could be the difference between refractive index of air versus ethanol. Depending on how they did the reflective coating for the cavity it may (reversibly) ruin it. But as long as the reflective coatings are on the insides that wouldn't be much of a problem.

Aligning a collimating lens in alcohol would be different from in air, which would be a problem if you want to produce a beam from the unit. If you are just looking at wavelength you could omit that and look at the output straight from the diode though a glass dewar vessel or even flask.

I would recommend the dewar though, since water from the air will constantly freeze onto a single walled vessel containing cold ethanol.
Benm is online now   Reply With Quote
Old 11-28-2015, 02:00 AM #11
CDBEAM777's Avatar
Class 2M Laser
 
Join Date: Feb 2010
Posts: 898
Rep Power: 22102
CDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond repute
CDBEAM777 CDBEAM777 is online now
Class 2M Laser
CDBEAM777's Avatar
 
Join Date: Feb 2010
Posts: 898
Rep Power: 22102
CDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond repute
Default Re: Super "chilled" ethanol Cooling system for NUBM44. Pic Heavy

Quote:
Originally Posted by Down with Umbrella View Post
Hahaha that's awesome cdbeamz. I'm saving that.
What is the poll? Oclaro 700 or a mit P73. Setting the diode at a more conservative amperage would be more app to shift I would think. Also if I'm not mistaken these diodes are open can. I wonder if the cooling would damage the diode even if the module is sealed. I've kill one in the past.
Well....Glad u like my warped humor !!! You are seriously on the right track !!!!

See this video....done by "Planters" Mr. Planters is just amazing !!! He is my hero !! He has some serious toys !!!

http://youtu.be/z8EuZwgdqQ4

OK....I vote for the Oclarro 700 !!! SOoooo...
Stoke that HH with some Dry Ice and Juice....and " Let'er Rip" !!!

Beam out
__________________
Lite'em Up CDBEAM=======>...and....
"Robby...Where have you been? I've beamed and beamed "

Solar Prominence-Laser Lumia combined with audio http://laserpointerforums.com/f47/laser-lumia-terrawatt-labs-97261.html
CYAN CANNON V BUILD-Green + Blue = Photon Cannon - Build resumed http://laserpointerforums.com/f49/cy...ild-94999.html
Titanium Cyprus TRI EDC with 520 nm and GITD Europium barrel rings-Completed http://laserpointerforums.com/f45/my...t-94978-2.html
TRIDENTIS BUILD-Three (3) 445 Combiner-Knife edge-Completed http://laserpointerforums.com/f65/tr...uty-83781.html
DRAGON'S HEAD BUILD-Optically corrected P73-Completed http://laserpointerforums.com/f50/no...ign-87235.html
Purple pHAZE Combiner - Red + Blue = Purple-Completed http://laserpointerforums.com/f42/pu...ple-93717.html
Sky Blue Ramjet-Corrected NUBMO7E- Completed http://laserpointerforums.com/f42/sk...ild-94646.html
Check out http://www.hobbylasers.com/
CDBEAM777 is online now   Reply With Quote
Old 11-28-2015, 03:17 AM #12
RedCowboy's Avatar
Class 3B Laser
 
Join Date: Jul 2015
Location: Suburbs of Atlanta Georgia
Posts: 4,896
Rep Power: 66927
RedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond repute
RedCowboy RedCowboy is online now
Class 3B Laser
RedCowboy's Avatar
 
Join Date: Jul 2015
Location: Suburbs of Atlanta Georgia
Posts: 4,896
Rep Power: 66927
RedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond repute
Default Re: Super "chilled" ethanol Cooling system for NUBM44. Pic Heavy

Quote:
Originally Posted by Down with Umbrella View Post
Hahaha that's awesome cdbeamz. I'm saving that.
What is the poll? Oclaro 700 or a mit P73. Setting the diode at a more conservative amperage would be more app to shift I would think. Also if I'm not mistaken these diodes are open can. I wonder if the cooling would damage the diode even if the module is sealed. I've kill one in the past.
I'm starting to prefer open can or removing the can, I just popped another window on a 7875 switching out lenses testing them at 65 feet in cool humid air.

I'm starting to see a pattern with cool humid air and a hot diode windows.
__________________
You can not put freedom in a bag.
It is in fact an abstract concept.
Yet it is the single most valuable thing anyone has ever had.
RedCowboy is online now   Reply With Quote
Old 11-28-2015, 05:07 AM #13
Down with Umbrella's Avatar
Class 2M Laser
 
Join Date: Aug 2013
Location: Kennebunk, Maine
Posts: 966
Rep Power: 2993
Down with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond repute
Down with Umbrella Down with Umbrella is offline
Class 2M Laser
Down with Umbrella's Avatar
 
Join Date: Aug 2013
Location: Kennebunk, Maine
Posts: 966
Rep Power: 2993
Down with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond repute
Default Re: Super "chilled" ethanol Cooling system for NUBM44. Pic Heavy

Quote:
Originally Posted by Benm View Post
Aligning a collimating lens in alcohol would be different from in air, which would be a problem if you want to produce a beam from the unit. If you are just looking at wavelength you could omit that and look at the output straight from the diode though a glass dewar vessel or even flask.

I would recommend the dewar though, since water from the air will constantly freeze onto a single walled vessel containing cold ethanol.
I've seen some submersion videos where they dip the diode in and observer the wavelength shift. I would like to see the collmulated beam.

Here's my other question mark. It you submerge a module with say a 3element lens into a clear beaker of ethanol it's possible a gas/liquid mixture would build between the lens and diode window because light passes through each differently this would change the beam profile. I would think.

If you sealed the lense threads could a pressure differential damage the diode? Not sure. Red cowboy might be on the right lines here. Even humidity.
Here is a photo of a 405 passing through alcohol with uv dye, mineral oil and water.

I don't have a dewer flask but I want one . They are pricy on eBay.

Open can diode just appear to be so much more fragile XD if that spring were to ever twist loose it could contact the wires and there's always the possibility of brass shavings.
With that said I have read many threads where the window breaks and you have to decann the diode. Never done it myself.
__________________
"Rosemary had an accident." TDWP


Last edited by Down with Umbrella; 11-28-2015 at 05:12 AM.
Down with Umbrella is offline   Reply With Quote
Old 11-28-2015, 02:07 PM #14
CDBEAM777's Avatar
Class 2M Laser
 
Join Date: Feb 2010
Posts: 898
Rep Power: 22102
CDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond repute
CDBEAM777 CDBEAM777 is online now
Class 2M Laser
CDBEAM777's Avatar
 
Join Date: Feb 2010
Posts: 898
Rep Power: 22102
CDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond reputeCDBEAM777 has a reputation beyond repute
Default Re: Super "chilled" ethanol Cooling system for NUBM44. Pic Heavy

Doctor U....MMMMmmmm ???? I just think submersion...of the module into a liquid bath...is a bad idea !!! Maybe I am wrong ?? Dunno....but....your goal....is to lower the temp of the LD....in the most efficient manner. I speculate that submersion would be an optical nightmare.

Cool the diode via convection !! Deep cool the base pate....which....via convection chills the LD mount...which...in turn ... cools the LD....the standard " Cold finger " approach.

To provide maximum efficiency...the concept of entombing the entire assemble...in an enclosed insulated chamber is likely a good idea....as in it contains the lowered temp atmosphere that is so difficult to achieve. And... a slight heating of the output window to prevent condensation/frost build-up is likely a desirable feature.

Now....hmmm...running a DI/Ethnol mix....thru a CU heat sink block...may be another avenue ?? And have the LD mount mounted to the CU block via an Iridium foil interface. I am sure we can study the computer/overclocker group's adventures to apply to the super-cooling of just the LD + Mount. They have been experimenting with super cooling for quite some time !!...and they share their experiments !!!

Just some thoughts !! And...how we apply these things to a HH unit is yet another hurdle !! I am sure others will have a more educated insight !!

Beam Out
__________________
Lite'em Up CDBEAM=======>...and....
"Robby...Where have you been? I've beamed and beamed "

Solar Prominence-Laser Lumia combined with audio http://laserpointerforums.com/f47/laser-lumia-terrawatt-labs-97261.html
CYAN CANNON V BUILD-Green + Blue = Photon Cannon - Build resumed http://laserpointerforums.com/f49/cy...ild-94999.html
Titanium Cyprus TRI EDC with 520 nm and GITD Europium barrel rings-Completed http://laserpointerforums.com/f45/my...t-94978-2.html
TRIDENTIS BUILD-Three (3) 445 Combiner-Knife edge-Completed http://laserpointerforums.com/f65/tr...uty-83781.html
DRAGON'S HEAD BUILD-Optically corrected P73-Completed http://laserpointerforums.com/f50/no...ign-87235.html
Purple pHAZE Combiner - Red + Blue = Purple-Completed http://laserpointerforums.com/f42/pu...ple-93717.html
Sky Blue Ramjet-Corrected NUBMO7E- Completed http://laserpointerforums.com/f42/sk...ild-94646.html
Check out http://www.hobbylasers.com/

Last edited by CDBEAM777; 11-28-2015 at 04:07 PM. Reason: Added more Beam Blah, Blah, Blah
CDBEAM777 is online now   Reply With Quote
Old 11-29-2015, 01:04 AM #15
Benm's Avatar
Class 4 Laser
 
Join Date: Aug 2007
Location: Netherlands
Posts: 7,495
Rep Power: 29264
Benm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond repute
Benm Benm is online now
Class 4 Laser
Benm's Avatar
 
Join Date: Aug 2007
Location: Netherlands
Posts: 7,495
Rep Power: 29264
Benm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond repute
Default Re: Super "chilled" ethanol Cooling system for NUBM44. Pic Heavy

Quote:
Originally Posted by Down with Umbrella View Post
Here's my other question mark. It you submerge a module with say a 3element lens into a clear beaker of ethanol it's possible a gas/liquid mixture would build between the lens and diode window because light passes through each differently this would change the beam profile. I would think.
If you submerged the entire module it would behave differently than in air. It's just the huge difference in breaking index of ethanol and air that causes this. If you submerged it in toluene the lens would hardly have any effect at all since it's breaking index is very close to that of glass.

I would not attempt to submerge it counting on no ethanol getting between the diode and lens either. What you could do is submerge the entire assemby into ethanol and room temperature and adjust the optics at that point, hopfully you are able to.

There still is quite a difference between ethanols optical density at -80 versus room temp, but perhaps this can be adjusted for once the whole system is cold. This lens adjustment would have to be done at low temperature using tweezers to turn the lens, but that should be doable. One thing here would be to use a single element lens, not a 3 element, since it could take a long time for ethanol to get between lens elements.
Benm is online now   Reply With Quote
Old 11-29-2015, 03:28 AM #16
Trendkilla254's Avatar
Dark Lord of the Sith
 
Join Date: Mar 2015
Location: Troy, Texas
Posts: 873
Rep Power: 2963
Trendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond repute
Send a message via Skype™ to Trendkilla254
Trendkilla254 Trendkilla254 is offline
Dark Lord of the Sith
Trendkilla254's Avatar
 
Join Date: Mar 2015
Location: Troy, Texas
Posts: 873
Rep Power: 2963
Trendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond repute
Send a message via Skype™ to Trendkilla254
Default Re: Super "chilled" ethanol Cooling system for NUBM44. Pic Heavy

I'm excited to see 638nm in that host.
__________________
New to Lasers? Click Here! THIS is the thread that answers all your "Where can I..." "Is this..." "How do I..."
Laser Safety
Eye Safety First:Uvex S1933X Skyper Safety Eyewear, Black Frame, SCT-Orange UV Extreme Anti-Fog Lens
"5mw"* 405nm Gearbest Pointer - Highly Unlikely to be 5mw
5mw 445nm Custom Pointer in a former Cordless Drill "Gun Style" Host - proof of concept before going into Nerf Gun
5mw ~515nm Bladed LightSaber Osram pl515 with "Growing Blade" Video attached (Host by Ehgemus)
5mw 532nm Pointer Broken? After months of no use it works now... can't explain.
5mw 685nm from 10fenny in Pen Host - Link - Broke Driver taking it apart
Graveyard
0mw 450nm Osram PL-450 RIP 11/25/2015
Two Laserlands 5mw 445nm Pens

Communication methods: Xbox Live\Skype\Steam\Gmail\Google Plus\Youtube - Trendkilla254
Trendkilla254 is offline   Reply With Quote
Reply





Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On











Loading
















Privacy Policy | Advertising Disclaimer | Terms of Use


 


All times are GMT. The time now is 11:38 PM.


Powered by: vBulletin
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO
Privacy Policy | Advertising Disclaimer | Terms of Use
Copyright (C) 2017 Laser Pointer Forums, LLC