Laser pointer forums - discuss laser pointers and laser technology. Read and write laser pointer reviews. Freely discuss companies that sell laser pointers.

Laser Pointers

Welcome to Laser Pointer Forums!

Top 50 Laser Pointer Companies - Green Lasers Top 50 Laser Pointer Companies - Blue Lasers Top 50 Laser Pointer Companies - Red Lasers
Top 50 Laser Pointer Companies - Yellow Lasers Top 50 Laser Pointer Companies - Purple Lasers Top 50 Laser Pointer Companies - Orange Lasers
Top Laser Pointers by Power - 1 Watt+ Top Laser Pointers by Power - 500mW+ Top Laser Pointers by Power - 250mW+
Laser Pointer Database High Power Laser Pointers Laser Pointer Diodes



Go Back   Laser Pointer Forums - Discuss Laser Pointers > Lasers > Red Lasers

cnilaser
Reply
 
LinkBack Thread Tools Display Modes
Old 05-20-2009, 12:34 AM   #33
Junior Member
 
Join Date: May 2009
Posts: 4
Rep Power: 0
gregkoz is on a distinguished road
Default Tough Way

That may work - however, significant efficiency loss at ruby /air boundary for the exit beam and the re-entrant beam. The external mirrors would need 1st surface coatings (silvering) and perfect parallel alignment.

The ruby rods have been ground & polished to perfect parallelism and thus are very efficient. The lasing action occurrs when light bounces from mirror to mirror within the rod - building in intensity as it courses to and fro in the medium.
gregkoz is offline   Reply With Quote
Old 05-20-2009, 06:49 PM   #34
Class 2M Laser
 
Join Date: Sep 2007
Posts: 526
Rep Power: 9
disma is on a distinguished road
Default

The rod is ar coated for external mirrors.
if worse comes to worse, I can always use my quarter shrinker caps.
disma is offline   Reply With Quote
Old 05-29-2009, 06:30 AM   #35
Junior Member
 
Chuck's Avatar
 
Join Date: Apr 2009
Posts: 14
Rep Power: 0
Chuck is on a distinguished road
Default

Thats a big rod and you are going to need to pump it hard...Hmm that does not sound right. Anyway, I had a 3"x.25 Ruby rod and minimum pump power was 150-200J.

Dont forget to make a pulse forming network to strecth out the flash a bit 1-2ms should be OK, otherwise you will be un necesarily beating up the flash tube.
Here is a video of mine running, it was q switched with a rotating mirror, thats the whining noise in the video. Also when it fires you can see a single frame of red flash at the back of the laser

http://www.youtube.com/watch?v=zH0-H1g72lc
Chuck is offline   Reply With Quote
Old 05-29-2009, 01:54 PM   #36
Class 2M Laser
 
Join Date: Sep 2007
Posts: 526
Rep Power: 9
disma is on a distinguished road
Default

ooo! thats prety nice! I hope mine works as well.

disma is offline   Reply With Quote
Old 05-29-2009, 04:18 PM   #37
Class 4 Laser
 
Cyparagon's Avatar
 
Join Date: Sep 2007
Location: Wisconsin
Posts: 7,438
Rep Power: 611
Cyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond repute
Default

Even with AR coating, the power inside the resonator is magnitudes more than anything leaving the chamber, so losses are greater than you'd think. Why isn't it ground at brewsters angle instead?
Cyparagon is online now   Reply With Quote
Old 05-29-2009, 06:05 PM   #38
Banned
 
Join Date: May 2009
Location: Asheville, NC
Posts: 1,403
Rep Power: 0
Darkarmyofone will become famous soon enoughDarkarmyofone will become famous soon enough
Send a message via AIM to Darkarmyofone
Default

Quote:
Originally Posted by Chuck View Post
Thats a big rod and you are going to need to pump it hard...Hmm that does not sound right.
lmao strange choice of wording, made me smile today though. what did this giant rod cost... i've seen smaller ones for mad high prices, this one is way bigger...maybe i dont even want to know lol
Darkarmyofone is offline   Reply With Quote
Old 05-29-2009, 06:31 PM   #39
Class 3B Laser
 
Spyderz20x6's Avatar
 
Join Date: Nov 2007
Location: Redmond, WA
Posts: 2,756
Rep Power: 123
Spyderz20x6 has a reputation beyond reputeSpyderz20x6 has a reputation beyond reputeSpyderz20x6 has a reputation beyond reputeSpyderz20x6 has a reputation beyond reputeSpyderz20x6 has a reputation beyond reputeSpyderz20x6 has a reputation beyond reputeSpyderz20x6 has a reputation beyond reputeSpyderz20x6 has a reputation beyond reputeSpyderz20x6 has a reputation beyond reputeSpyderz20x6 has a reputation beyond reputeSpyderz20x6 has a reputation beyond repute
Send a message via MSN to Spyderz20x6
Default

Quote:
Originally Posted by Chuck View Post
Thats a big rod and you are going to need to pump it hard...Hmm that does not sound right. Anyway, I had a 3"x.25 Ruby rod and minimum pump power was 150-200J.

Dont forget to make a pulse forming network to strecth out the flash a bit 1-2ms should be OK, otherwise you will be un necesarily beating up the flash tube.
Here is a video of mine running, it was q switched with a rotating mirror, thats the whining noise in the video. Also when it fires you can see a single frame of red flash at the back of the laser

http://www.youtube.com/watch?v=zH0-H1g72lc
That's what she said
__________________
Spyderz20x6

The Copperhead: 330mW Copper Heatsinked Pocket Pal w/ Meredith Glass Lens and Open Can Diode! See Here
1x 20x 650nm 250mW Burning Mini Laser
1x 20X Open Can 280mW Mini Pocket Burner in 4" Host
1x DX 532nm 10mW Laser
1x 780nm NIR Dorcy Jr. 250mW Laser
KES-400A PS3 405nm Blu-Ray 10mW
PHR-803T Mini 4 inch 405nm Blu-Ray 140mW

Are you a beginner, wanting to build a DIY laser, but do not have a clue about how? Well, then look here!


"its cool dont worrie about it its under controle"
-Jake21, 2009
Spyderz20x6 is offline   Reply With Quote
Old 05-29-2009, 10:50 PM   #40
Class 2 Laser
 
lazer's Avatar
 
Join Date: Dec 2008
Location: Phoenix
Posts: 361
Rep Power: 8
lazer will become famous soon enoughlazer will become famous soon enough
Default

Aren't ruby rods usually coated 100% on one side and the other 90%?
lazer is offline   Reply With Quote
Old 05-29-2009, 11:34 PM   #41
Banned
 
Join Date: Apr 2007
Location: Cupertino CA
Posts: 1,076
Rep Power: 0
Laser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond repute
Send a message via AIM to Laser_Ben
Default

Quote:
Originally Posted by GooeyGus View Post
This would just make life so much easier for you...



I actually cant find any helical lamps on ebay right now though... weird...
Ruby is VERY brittle, I used a few small crystals for pumping with LEDs, but the problem is that A, it thermal lenses, and B, it is too brittle to hold in a semi rigid mount. You WILL need high flow water to get that even remotely cooled. Additionally, the lamps will require cooling.

It is a 3 level laser which means you need a LOT of power to get that going. You are probably going to need 800-1000J of light out of the lamps to get that to threshold. That means you need to put in about 2000J with good lamps.

The capacitor bank for that will need to be quite large. You will really be challenged getting this working, but it's a good project to learn from because the results are very visible.
Laser_Ben is offline   Reply With Quote
Old 11-27-2009, 07:36 AM   #42
Class 1 Laser
 
jarrod694's Avatar
 
Join Date: Nov 2009
Posts: 70
Rep Power: 17
jarrod694 has much to be proud ofjarrod694 has much to be proud ofjarrod694 has much to be proud ofjarrod694 has much to be proud ofjarrod694 has much to be proud ofjarrod694 has much to be proud ofjarrod694 has much to be proud ofjarrod694 has much to be proud ofjarrod694 has much to be proud of
Default Re: awesome ruby laser rod

I just completed a very powerful laser. It is simple, and uses very cheap and common parts, with the exception of the laser rod. Are you still serious about constructing your laser? If so, then I think I can help you.

It doesn't get much more simple that this:

http://farm3.static.flickr.com/2472/...f8a47898_o.jpg

But the performance is good:

http://farm3.static.flickr.com/2650/...070d9cd6_o.jpg

http://farm4.static.flickr.com/3502/...984ecfa7_o.jpg

http://farm3.static.flickr.com/2602/...85954334_o.jpg

http://farm3.static.flickr.com/2706/...dfc1021f_o.jpg

http://farm3.static.flickr.com/2697/...55be5c11_o.jpg
jarrod694 is offline   Reply With Quote
Old 11-27-2009, 08:46 AM   #43
Class 4 Laser
 
HIMNL9's Avatar
 
Join Date: May 2009
Location: Lost somewhere in the EU mess ;)
Posts: 5,426
Rep Power: 236
HIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond repute
Default Re: awesome ruby laser rod

Use a ceramic tube (insulant, heath resistant, and the white vetrified surface is a very good reflector), put the rod in center and 3 or 4 linear lamps all around (also 6, if you want ), and COOL IT WELL

Aluminum cans are not exactly the better choices, for these types of assemblies ..... and elliptical twin-focus cavities require so much micrometrical precision in building it well, that the cost can be prohibitive.

__________________
High Impulse Multipath Neutron Laser (mark 9 ) (LOL)
Dare mo mita koto no nai, kaze, kumo, suna, umi ..... Kokoro no hate no doko ka eien ga kagayaku.
HIMNL9 is offline   Reply With Quote
Old 11-27-2009, 01:41 PM   #44
Class 1 Laser
 
Join Date: Dec 2008
Posts: 55
Rep Power: 6
Daedronus will become famous soon enough
Default Re: awesome ruby laser rod

I can't believe you managed to put a hole in that spoon, nice work
Daedronus is offline   Reply With Quote
Old 11-27-2009, 03:38 PM   #45
Class 1 Laser
 
jarrod694's Avatar
 
Join Date: Nov 2009
Posts: 70
Rep Power: 17
jarrod694 has much to be proud ofjarrod694 has much to be proud ofjarrod694 has much to be proud ofjarrod694 has much to be proud ofjarrod694 has much to be proud ofjarrod694 has much to be proud ofjarrod694 has much to be proud ofjarrod694 has much to be proud ofjarrod694 has much to be proud of
Default Re: awesome ruby laser rod

Thanks.

I recommend avoiding fancy elliptical reflectors or spiral shaped lamps. I used one large linear lamp I aquired on Ebay. I basically wrapped the lamp and rod together in a flexible reflective material. Aluminum flashing works well here, however you must remove any type of 'protective' enamel or coating it has before using. It should also be polished brightly. My laser is not pretty (really crude arrangement with a lamp and rod just laying on a block of wood, with cardboard box covering the lamp, and wire trigger leads just taped across top of wood), but it works really well.

My laser also works with very LITTLE feedback. I use a YAG output coupler that probably provides only 10 or 20% reflectance at best. In fact, I've used ordinary glass slides (cut from picture frame glass) for an output coupler. The capacitors are just electrolytics. Aside from the rod, it's pretty basic.
jarrod694 is offline   Reply With Quote
Old 11-27-2009, 04:03 PM   #46
Class 1 Laser
 
jarrod694's Avatar
 
Join Date: Nov 2009
Posts: 70
Rep Power: 17
jarrod694 has much to be proud ofjarrod694 has much to be proud ofjarrod694 has much to be proud ofjarrod694 has much to be proud ofjarrod694 has much to be proud ofjarrod694 has much to be proud ofjarrod694 has much to be proud ofjarrod694 has much to be proud ofjarrod694 has much to be proud of
Default Re: awesome ruby laser rod

I have one high reflector designed for 694nm. You don't need anything special for an output coupler - even ordinary glass worked for me.

Obtain a good quality surface-first type mirror (like the good quality ones obtained from inside a copying machine). Try using this for your high reflector. Then cut 3 equally sized glass slides from a section or ordinary glass (I used picture frame glass for mine). Press the glass slides together so that the spots from a pointer or HeNe laser are combined when reflected off of them, and onto a nearby wall. Once this is accomplished, use a metal clip, rubber bands, or come up with some method to hold them tightly together so that they are all parallel. This makes a cheap but surprisingly good OC for a DIY ruby laser.

Here is an example of my experimental setup using this approach.

http://farm3.static.flickr.com/2423/...23b40a46_o.jpg

And here is the laser in action using this simple approach.

http://farm3.static.flickr.com/2743/...e0386966_o.jpg

http://farm3.static.flickr.com/2504/...0eca2c0d_o.jpg
jarrod694 is offline   Reply With Quote
Old 11-27-2009, 04:34 PM   #47
Class 3R Laser
 
Gryphon's Avatar
 
Join Date: May 2009
Location: Panama City, Florida
Posts: 1,838
Rep Power: 129
Gryphon has a reputation beyond reputeGryphon has a reputation beyond reputeGryphon has a reputation beyond reputeGryphon has a reputation beyond reputeGryphon has a reputation beyond reputeGryphon has a reputation beyond reputeGryphon has a reputation beyond reputeGryphon has a reputation beyond reputeGryphon has a reputation beyond reputeGryphon has a reputation beyond reputeGryphon has a reputation beyond repute
Default Re: awesome ruby laser rod

NICE! Did you blast through the spoon and screw driver with only one shot?
__________________
I see................wait, what now?

(3x) 405nm
(6x) 445nm
(4x) 532nm
(1x) 543nm
(1x) 632.8nm
(1x) 635nm
(3x) 660nm
SSY-1 Laser
Gryphon is offline   Reply With Quote
Old 11-27-2009, 04:37 PM   #48
Class 2 Laser
 
roosl's Avatar
 
Join Date: Oct 2009
Location: Phoenix
Posts: 389
Rep Power: 147
roosl has a reputation beyond reputeroosl has a reputation beyond reputeroosl has a reputation beyond reputeroosl has a reputation beyond reputeroosl has a reputation beyond reputeroosl has a reputation beyond reputeroosl has a reputation beyond reputeroosl has a reputation beyond reputeroosl has a reputation beyond reputeroosl has a reputation beyond reputeroosl has a reputation beyond repute
Default Re: awesome ruby laser rod

Now THAT is DIY laser work!

Very nice!
__________________
-Russell -aka- Roosl

My 1st green laser is an Optotronics RPL-400
My blue laser is an Optotronics RPL-30
Like this Forum? Keep it charged! Donate!
Please keep lasers safe and legal!
Invitation: 3D Art Gallery and Lasers
FaceBook
roosl is offline   Reply With Quote
Reply


Database of Laser Pointer Companies




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


laser pointer forums top













Top 50 Laser Pointer Companies - Green Lasers Top 50 Laser Pointer Companies - Blue Lasers Top 50 Laser Pointer Companies - Red Lasers
Top 50 Laser Pointer Companies - Yellow Lasers Top 50 Laser Pointer Companies - Purple Lasers Top 50 Laser Pointer Companies - Orange Lasers
Top Laser Pointers by Power - 1 Watt+ Top Laser Pointers by Power - 500mW+ Top Laser Pointers by Power - 250mW+
Laser Pointer Database High Power Laser Pointers Laser Pointer Diodes




All times are GMT. The time now is 09:13 PM.


Powered by: vBulletin
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO
Privacy Policy | Advertising Disclaimer | Terms of Use
Copyright (C) 2014 Laser Pointer Forums, LLC