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





Welcome to Laser Pointer Forums! If you are looking for a laser pointer or want to compare different laser pointer companies, you may want to check out the LPF Laser Pointer Company Database. The link will open in a new window for your convenience.








Green Laser Pointers by Category Blue Laser Pointers by Category Red Laser Pointers by Category
Yellow Laser Pointers by Category Violet Laser Pointers by Category Orange Laser Pointers by Category
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
Laser Technology Laser Pointer Parts Lasers by Wavelength
Top 10 Laser Pointer Companies Laser Pointer Company Database Visible Beam Laser Pointers


One laser store meets all your needs

























Go Back   Laser Pointer Forums - Discuss Laser Pointers > Lasers > Tutorials, Help & Repairs



LPF List of Laser Pointer Companies (link opens new window)



Reply
 
LinkBack Thread Tools Display Modes
Old 01-29-2010, 03:40 PM #17
Class 4 Laser
 
Join Date: Nov 2008
Posts: 5,728
Rep Power: 547
ElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond repute
ElektroFreak ElektroFreak is offline
Class 4 Laser
 
Join Date: Nov 2008
Posts: 5,728
Rep Power: 547
ElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond repute
Default Re: 9mm 808nm + crystal and no green?

dig-cams are a very good method, and that's what I recommend. If you're working with lower powered 808nm diodes (up to about 200mW) you can use your eyes as long as you watch your angles so as not to reflect the IR directly into your eyes. 808nm is close enough to visible for there to be a faint red glow that will help you align everything. Using your eyes is risky, so I personally recommend using an IR sensitive camera any time you work with IR.


__________________
Laser Resources (for n00bs and veterans alike!)

Sam's Laser FAQ (The Laser Bible)

http://www.repairfaq.org/sam/laserfaq.htm

RP Photonics Encyclopedia of Laser Physics and Technology

http://www.rp-photonics.com/encyclopedia.html

ULTIMATE DIY PROJECTOR REFERENCE

http://nqlasers.com/scannerreference...itle=Main_Page

SUCCESS is the best revenge.
ElektroFreak is offline   Reply With Quote







LPF List of Laser Pointer Companies (link opens new window)







Old 01-29-2010, 04:17 PM #18
ReNNo's Avatar
Class 2M Laser
 
Join Date: Mar 2009
Location: Kakanj, Bosnia and Herzegovina
Posts: 589
Rep Power: 42
ReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond repute
ReNNo ReNNo is offline
Class 2M Laser
ReNNo's Avatar
 
Join Date: Mar 2009
Location: Kakanj, Bosnia and Herzegovina
Posts: 589
Rep Power: 42
ReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond repute
Default Re: 9mm 808nm + crystal and no green?

Quote:
Originally Posted by ElektroFreak View Post
Your best bet is to use a simple collimating lens to focus the 808 (assuming your diode is 808 with a low tolerance) to a point just past the input surface of your crystals. Direct-coupling (placing the diode right next to the crystals) does work, but it's easier and more efficient if the 808nm light is focused into the crystals.
Most of lenses have focal point of 5mm (aixiz) or more.
If he wants to focus light with lens he has to put lens much more than 5mm away from diode so he can have focal point at the closest distance possible.
That means that he need much longer module and may not fit easily in host.
Another problem is that 7mm lenses with 5+mm FL can not collect all light from IR multimode diodes.

The best way is to remove can from diode so he can put crystal closer to diode.
__________________
My lasers:
Homemade Red laser @410mA LOC + AixiZ glass lens
Homemade Blue-Ray laser @ 100mA PHR-803T
O-like Green (532nm) 150mW module in UF WF-501B host
808nm 1W Homemade IR portable laser
3 motor spirograph (Homemade)
ReNNo is offline   Reply With Quote
Old 01-29-2010, 04:39 PM #19
Class 4 Laser
 
Join Date: Nov 2008
Posts: 5,728
Rep Power: 547
ElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond repute
ElektroFreak ElektroFreak is offline
Class 4 Laser
 
Join Date: Nov 2008
Posts: 5,728
Rep Power: 547
ElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond repute
Default Re: 9mm 808nm + crystal and no green?

Direct coupling is inefficient, plain and simple. In good portables, the diode is always collimated (at least with a FAC) to channel the pump energy into the crystal. In real good DPSS lab-style laser, a pair of prisms is used along with the FAC to even out the pump energy. Direct-coupling is half-assed, but if that's the only way it'll work in your installation, that's all you can do.

Here's where I'm coming from: I believe that if you intend to learn how to construct DPSS lasers, you should learn the proper way, so any time I give advice it is with that in mind. Cheap Chinese lasers use direct-coupling all the time, but to me that's a big reason why I consider them to be inferior. Proper focusing and correction of the pump energy is the only good way to do it if efficiency, stability and beam quality are important to you.
__________________
Laser Resources (for n00bs and veterans alike!)

Sam's Laser FAQ (The Laser Bible)

http://www.repairfaq.org/sam/laserfaq.htm

RP Photonics Encyclopedia of Laser Physics and Technology

http://www.rp-photonics.com/encyclopedia.html

ULTIMATE DIY PROJECTOR REFERENCE

http://nqlasers.com/scannerreference...itle=Main_Page

SUCCESS is the best revenge.

Last edited by ElektroFreak; 01-29-2010 at 04:44 PM.
ElektroFreak is offline   Reply With Quote
Old 01-29-2010, 05:01 PM #20
Cyparagon's Avatar
Class 4 Laser
 
Join Date: Sep 2007
Location: Wisconsin
Posts: 9,142
Rep Power: 9321
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
Cyparagon Cyparagon is online now
Class 4 Laser
Cyparagon's Avatar
 
Join Date: Sep 2007
Location: Wisconsin
Posts: 9,142
Rep Power: 9321
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 Re: 9mm 808nm + crystal and no green?

Quote:
Originally Posted by Hemlock_Mike View Post
Columinating before the crystal is done with exterior lenses or an FAC coating on the diode normally.
HMike
Four things:
1. It's "collimating."
2. The diode's IR beam is never collimated in a green, but it can be focused on the crystal face.
3. FAC can not be achieved with a coating, it must be a lens.
4. FAC does not collimate, it brings the fast-axis divergence closer to the slow axis divergence.
__________________
A problem well stated is a problem half solved.
Cyparagon is online now   Reply With Quote
Old 01-29-2010, 06:59 PM #21
Danjoo's Avatar
Class 1M Laser
 
Join Date: Sep 2008
Posts: 202
Rep Power: 9
Danjoo is on a distinguished road
Send a message via ICQ to Danjoo
Danjoo Danjoo is offline
Class 1M Laser
Danjoo's Avatar
 
Join Date: Sep 2008
Posts: 202
Rep Power: 9
Danjoo is on a distinguished road
Send a message via ICQ to Danjoo
Default Re: 9mm 808nm + crystal and no green?

Wow, alot of help and information.

For now i dont build a DPSS Laby. Many thanx for the explanation.
I want to go with the housing i have already. Like i understand for that reason i can cancel focusing the ir bevor the crystal. It take to much lenght.

The hottest topic for me is the decan thing...

How is this done best way? On a lathe?
Any hints?


@HIMNL9
I hope the surface of the crystal is clean, i keep an eye on that topic.


@all
I use my mobil phone camera of my samsung I550 it shows the ir.
My DSLR cannot catch the ir maybe a filter somewhere.



Thanx



Daniel
Danjoo is offline   Reply With Quote
Old 01-30-2010, 11:17 AM #22
Danjoo's Avatar
Class 1M Laser
 
Join Date: Sep 2008
Posts: 202
Rep Power: 9
Danjoo is on a distinguished road
Send a message via ICQ to Danjoo
Danjoo Danjoo is offline
Class 1M Laser
Danjoo's Avatar
 
Join Date: Sep 2008
Posts: 202
Rep Power: 9
Danjoo is on a distinguished road
Send a message via ICQ to Danjoo
Thumbs up Re: 9mm 808nm + crystal and no green?

Juhu, it works.

I decan the 9mm diode and now the output is best at 90 mw green from 350 mw IR.

Complete with the driver at 800ma to the driver i get 130 mw of green beam.


Very nice, crystal closer to the diode is the solution.


I take some pictures, i post later.


Thanx

Daniel
Danjoo is offline   Reply With Quote
Old 01-30-2010, 12:40 PM #23
Class 3B Laser
 
Join Date: Oct 2009
Location: Central New York State - Watkins Glen - planet Earth
Posts: 2,745
Rep Power: 101
photonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond repute
photonaholic photonaholic is offline
Class 3B Laser
 
Join Date: Oct 2009
Location: Central New York State - Watkins Glen - planet Earth
Posts: 2,745
Rep Power: 101
photonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond repute
Default Re: 9mm 808nm + crystal and no green?

Nice Job Daniel!!! well done.
__________________
Thanks for reading my post.
Kind regards, Wayne

------------------------------------------------------------------
"Disclaimer: all posts made by me are based on my own opinion only,
That opinion is subject to change without notice."


Too much knowledge is dangerous, not enough is worse.
Adapted from Einstein quote.
------------------------------------------------------------------
If you want to burn things, buy a lighter
------------------------------------------------------------------
My Pet Forums - for the animal fans Link
Dances With Reptiles - If you like snakes Link
photonaholic is offline   Reply With Quote
Old 01-30-2010, 05:02 PM #24
Banned
 
Join Date: Jan 2009
Location: In A State of Shock.
Posts: 11,871
Rep Power: 0
Tech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond repute
Tech_Junkie Tech_Junkie is offline
Banned
 
Join Date: Jan 2009
Location: In A State of Shock.
Posts: 11,871
Rep Power: 0
Tech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond repute
Default Re: 9mm 808nm + crystal and no green?

*Basking in irony part 2*

Hope you're keeping count EF LOL.
Tech_Junkie is offline   Reply With Quote
Old 02-01-2010, 11:46 AM #25
Danjoo's Avatar
Class 1M Laser
 
Join Date: Sep 2008
Posts: 202
Rep Power: 9
Danjoo is on a distinguished road
Send a message via ICQ to Danjoo
Danjoo Danjoo is offline
Class 1M Laser
Danjoo's Avatar
 
Join Date: Sep 2008
Posts: 202
Rep Power: 9
Danjoo is on a distinguished road
Send a message via ICQ to Danjoo
Red face Re: 9mm 808nm + crystal and no green?

Hm In the end i get only around 100mw green beam.

The 130mw was bevor the two lenses.




Finally i decan the 9mm diode the brings the distance between the diode and the crystal down to half a millimeter.
The decanning is done with a tomato knife, a make a cut around the can, then carefully break the can of with a pliers. I practice befor with a dead red 5,6mm...









On the diode are 3 connectors.
The anode and cathode is ok, but in the decan prozess I kill the bond wire to the third connector.

I check the output and the output is still the same power like with the undamaged bondwire.
But the beamshap is crap, it looks like it work in tem01 permanently.



Is this from the defekt bond wire?
The beam can be collimated to infinity with the optics, its just for the photo opened beam.

Some of the picts are from mobile phone because of their capability, one from dslr without the ir radiation.

Best regards

Daniel
Danjoo is offline   Reply With Quote
Old 02-01-2010, 01:18 PM #26
HIMNL9's Avatar
Class 4 Laser
 
Join Date: May 2009
Location: Lost somewhere in the EU mess ;)
Posts: 5,416
Rep Power: 404
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
HIMNL9 HIMNL9 is offline
Class 4 Laser
HIMNL9's Avatar
 
Join Date: May 2009
Location: Lost somewhere in the EU mess ;)
Posts: 5,416
Rep Power: 404
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: 9mm 808nm + crystal and no green?

No, you do not have a broken wire, there, be sure ..... the third pin is sometimes used, in some diodes, for connect a photodiode that rest on the "facet" that you see rear the chip support ..... but in most of these diodes, this chip is not present, so there's just no wire soldered on this pin.

It look that your diode is one without a photodiode (at least from that angle of view), so the pin is just not connected to anything, but also in case the photodiode was there, if the circuit is not using it, you don't need to connect anything on that pin (can be a different hing in those drivers that use the photodiode for a loopback power control, but this depend from your driver) ..... i cannot be 100% sure about this, but from the pics that you have posted, also if your original diode had the photodiode hip (the small square black chip on the base of the diode, rear the laser chip), your driver seem one of the ones that don't need/use the internal photodiode, but one of these that have a big resistor for measure the current and regulate it, so this thing is probably ok

About the dot shape, i'm not sure, can be alignment problems (not just the crystal need to be rotated for match the polarization, but also need to be aligned with the more possible precision for be in center with the laser chip) ..... another possibility is that the diode is so much "multimode", that also the crystal cannot align its output correctly, but in this case, there's not too much to do .....
__________________
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 02-01-2010, 01:36 PM #27
Class 4 Laser
 
Join Date: Nov 2008
Posts: 5,728
Rep Power: 547
ElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond repute
ElektroFreak ElektroFreak is offline
Class 4 Laser
 
Join Date: Nov 2008
Posts: 5,728
Rep Power: 547
ElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond repute
Default Re: 9mm 808nm + crystal and no green?

Quote:
Originally Posted by Danjoo View Post
I check the output and the output is still the same power like with the undamaged bondwire.
But the beamshap is crap, it looks like it work in tem01 permanently.



Is this from the defekt bond wire?
The beam can be collimated to infinity with the optics, its just for the photo opened beam.

Some of the picts are from mobile phone because of their capability, one from dslr without the ir radiation.

Best regards

Daniel
Quote:
Originally Posted by HIMNL9 View Post

About the dot shape, i'm not sure, can be alignment problems (not just the crystal need to be rotated for match the polarization, but also need to be aligned with the more possible precision for be in center with the laser chip) ..... another possibility is that the diode is so much "multimode", that also the crystal cannot align its output correctly, but in this case, there's not too much to do .....
^There's your answer, Danjoo, and HIMNL9 is likely correct on both counts. As I had posted earlier, using pump correction optics instead of direct-coupling is better if stability, beam quality, and efficiency are important to you. Now you're seeing why.

If building DPSS lasers is interestign to you and you want to learn more about how to do it properly, check out this link: Sam's Laser FAQ - Home-Built Diode Pumped Solid State (DPSS) Laser
__________________
Laser Resources (for n00bs and veterans alike!)

Sam's Laser FAQ (The Laser Bible)

http://www.repairfaq.org/sam/laserfaq.htm

RP Photonics Encyclopedia of Laser Physics and Technology

http://www.rp-photonics.com/encyclopedia.html

ULTIMATE DIY PROJECTOR REFERENCE

http://nqlasers.com/scannerreference...itle=Main_Page

SUCCESS is the best revenge.

Last edited by ElektroFreak; 02-01-2010 at 03:47 PM.
ElektroFreak is offline   Reply With Quote
Old 02-01-2010, 03:09 PM #28
Danjoo's Avatar
Class 1M Laser
 
Join Date: Sep 2008
Posts: 202
Rep Power: 9
Danjoo is on a distinguished road
Send a message via ICQ to Danjoo
Danjoo Danjoo is offline
Class 1M Laser
Danjoo's Avatar
 
Join Date: Sep 2008
Posts: 202
Rep Power: 9
Danjoo is on a distinguished road
Send a message via ICQ to Danjoo
Thumbs up Re: 9mm 808nm + crystal and no green?

Many thanks for this clearifying.

Ok the beam has that bad tem01 shape in every power level right from when i turn the power on my lab power supply slowly up. This is permanent. Not mod hopping.


Ok THIS projekt is finished.

But now my blood is stird up for the DPSS thing...

I have a few broken cheap pointers to harvest and some 500mw 808 diodes left.

Seeya later I have to build a green DPSS Labby.
(Accidently iam not at work, and cannot use mashines, because of I take some Parent time for my first son. It will be a getto dremel Labby.) hehe

Many Thanx for your support

Daniel
Danjoo 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








Green Laser Pointers by Category Blue Laser Pointers by Category Red Laser Pointers by Category
Yellow Laser Pointers by Category Violet Laser Pointers by Category Orange Laser Pointers by Category
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






Privacy Policy | Advertising Disclaimer | Terms of Use


 


All times are GMT. The time now is 05:34 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