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Old 07-19-2011, 04:38 PM #1
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Default Help identifying and powering diodes

Hi all, I found these diodes at a surplus store and I don't know too much about them other than the box they were in was labeled 904nm 8w pulsed. At first I didn't even realize there were two different diodes until I looked closely under an eye loop. These diodes appear to be pulled from some sort of an array as they are all numbered sequentially on the back and side with a sharpie.









So, how can I power these to test them? I bought a couple 555 timers in hopes that I could use them to setup a pulsed driver, but I've never done that and haven't been able to find very much info about it via the search button. Any help would be greatly appreciated.


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80mw-130mw 405nm (12+ builds) PHR803T harvested from sleds
>200mw 405nm (3x) SF-AW210
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>100mw 532nm (4x) O-like modules
>80mw 532nm (3x) "fleabay" modules
>200mw 532nm (1x) Trilights "150mw" TEC cooled, TTL Lab module
<5mw 632nm (1x) Lasiris Inc. Lab module
150mw->300mw 650nm (10+ builds) LOC harvested diodes
100mw 660nm (10x) 9mm can, unknown Manufacturer
>100mw 780nm (10+x) PHR sled IR diodes and various DVD burners
>3.5watts ?904nm? (1x) C-mount, unknown manufacturer
150mw->500mw RGUV "White Laser" (3x) Custom Carbon Fiber Builds
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Old 07-19-2011, 08:57 PM #2
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Default Re: Help identifying and powering diodes

$29 laser diode (not a diode bar) that is 10 Watts?!?
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Old 07-19-2011, 10:02 PM #3
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Default Re: Help identifying and powering diodes

Cyparagon, thanks for the link.

I happened to be near the place I picked up these diodes from, so I stopped by and asked if they had any info on them. All they could provide me with was the lable on the box so I snapped a pic.



I know these aren't exactly high output diodes but I'd like to get them functioning. I'm guessing they were used in ranging.
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Build Log
80mw-130mw 405nm (12+ builds) PHR803T harvested from sleds
>200mw 405nm (3x) SF-AW210
>500mw 405nm (2x) 10XBDR-S06
>100mw 532nm (4x) O-like modules
>80mw 532nm (3x) "fleabay" modules
>200mw 532nm (1x) Trilights "150mw" TEC cooled, TTL Lab module
<5mw 632nm (1x) Lasiris Inc. Lab module
150mw->300mw 650nm (10+ builds) LOC harvested diodes
100mw 660nm (10x) 9mm can, unknown Manufacturer
>100mw 780nm (10+x) PHR sled IR diodes and various DVD burners
>3.5watts ?904nm? (1x) C-mount, unknown manufacturer
150mw->500mw RGUV "White Laser" (3x) Custom Carbon Fiber Builds
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Old 07-21-2011, 03:18 PM #4
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Default Re: Help identifying and powering diodes

This one maybe is not the same, but could be similarly.

This model in particular that I give, usually works at 50ns, 1 kHz.

Anyway here you have the technical data in PDF format to give you an idea.

http://www.roithner-laser.com/previo...PLD904-8-T.pdf

And for the driver look here, in the section "Pulsed Laser Diode Drivers" maybe can help a little.

Sam's Laser FAQ - Diode Laser Power Supplies

I hope to be helpful
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Old 07-21-2011, 04:11 PM #5
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Default Re: Help identifying and powering diodes

They are IR so you need a variable amperage power source that can provide 1-3V and then just start low like 100mA and start to increase from there with the diode in a good heatsink. At each currently level plot the powerVScurrent on an xy graph. Output power on left current on bottom. Then as you go look for where the graph starts to level off and usually thats where a true max output will be. Sometimes it will not level off and you may over power the diodes and destroy them. But if you have several and no spec sheet that may just be what you have to do. If the first one blows at 1000mA then set the second one to 6-800mA.
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Old 07-26-2011, 01:05 PM #6
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Default Re: Help identifying and powering diodes

Quote:
Originally Posted by piferal View Post
This one maybe is not the same, but could be similarly.

This model in particular that I give, usually works at 50ns, 1 kHz.

Anyway here you have the technical data in PDF format to give you an idea.

http://www.roithner-laser.com/previo...PLD904-8-T.pdf

And for the driver look here, in the section "Pulsed Laser Diode Drivers" maybe can help a little.

Sam's Laser FAQ - Diode Laser Power Supplies

I hope to be helpful
Very helpful indeed, thank you! I should have known to check Sam'a FAQ However, I'm not sure where I'm going to get a 200VDC power supply Anyway, thanks again +1 rep!

Quote:
Originally Posted by Helios View Post
They are IR so you need a variable amperage power source that can provide 1-3V and then just start low like 100mA and start to increase from there with the diode in a good heatsink. At each currently level plot the powerVScurrent on an xy graph. Output power on left current on bottom. Then as you go look for where the graph starts to level off and usually thats where a true max output will be. Sometimes it will not level off and you may over power the diodes and destroy them. But if you have several and no spec sheet that may just be what you have to do. If the first one blows at 1000mA then set the second one to 6-800mA.
Thank you for the suggestion. I unfortunately do not have an LPM yet (I know, it's a long over due investment) and with the driver being pulsed I'm not sure how much data I can accurately record without having more sophisticated equipment. I will however attempt to get this one of these diodes going and I'll be sure to post back with any info. Thanks for the help!
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80mw-130mw 405nm (12+ builds) PHR803T harvested from sleds
>200mw 405nm (3x) SF-AW210
>500mw 405nm (2x) 10XBDR-S06
>100mw 532nm (4x) O-like modules
>80mw 532nm (3x) "fleabay" modules
>200mw 532nm (1x) Trilights "150mw" TEC cooled, TTL Lab module
<5mw 632nm (1x) Lasiris Inc. Lab module
150mw->300mw 650nm (10+ builds) LOC harvested diodes
100mw 660nm (10x) 9mm can, unknown Manufacturer
>100mw 780nm (10+x) PHR sled IR diodes and various DVD burners
>3.5watts ?904nm? (1x) C-mount, unknown manufacturer
150mw->500mw RGUV "White Laser" (3x) Custom Carbon Fiber Builds
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