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Old 03-24-2016, 09:56 PM #1
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Question n00b question about driver voltage

Hello, folks. I have some TO-5 1W 808nm diodes I want to do some bench experimenting with. I also have a BDR-209 405nm diode coming. Eventually I'd like to be able to run more powerful diodes as well.

I'm looking at getting a SDL / IDL-820 type driver to support this work.

The 808 and 405 diodes run at different voltages.

Can the IDL-820 be adjusted for this? I see that the current levels can be set, but don't see anything about voltage.

Can somebody hit me with the clue stick?

Thanks.


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Old 03-24-2016, 10:16 PM #2
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Default Re: n00b question about driver voltage

Quote:
Originally Posted by peterloron View Post
Hello, folks. I have some TO-5 1W 808nm diodes I want to do some bench experimenting with. I also have a BDR-209 405nm diode coming. Eventually I'd like to be able to run more powerful diodes as well.

I'm looking at getting a SDL / IDL-820 type driver to support this work.

The 808 and 405 diodes run at different voltages.

Can the IDL-820 be adjusted for this? I see that the current levels can be set, but don't see anything about voltage.

Can somebody hit me with the clue stick?

Thanks.

Have a link to the driver/component you mentioned? A quick use of my google-fu didn't turn up much.
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405nm | Banggood LT-850 | "5mW" | Review Unit | Review WIP
445nm | Sanwu Laser Pocket Series | 400mW Metered
445nm | NDB7242E Pen Build | 60mW Metered | >>Build Thread<<
450nm | LaserPointerStore - Thor H2 | 1W(?) | Review Unit | >>Review<<
488nm | Spectra Physics 163 Argon | ~30mW Metered
515nm | PL515 Pen Build | 50mW Metered | >>Build Thread<<
520nm | Laserlands 520 | 5mW | Review Unit | 3mW metered | >>Review<<
532nm | Gearbest 303 Pointer | 50mW Metered
532nm | Gearbest JD-850 Pointer | 30mW Metered (I think, need to re-test).
633nm | HeNe | 6mW
633nm | Spectra Physics 155 HeNe | <1mW >>Thread<<
650nm | Sanwu Laser Pocket Series | 200mW Metered
808nm | Melles Griot 532nm Lab Unit | No Crystals >10W | X2



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Old 03-24-2016, 10:28 PM #3
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Default Re: n00b question about driver voltage

Here you go:

http://www.markettechinc.net/pdf/LDI-820DD.pdf

Thanks.
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Old 03-24-2016, 10:44 PM #4
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Default Re: n00b question about driver voltage

Quote:
Originally Posted by peterloron View Post

Thanks!

Looks like that will drive your 808nm diode just fine - however, it likely won't drive your BDR-209. Maximum Compliance Voltage is listed as 4V, the BDR-209 needs more than that IIRC.

To answer your question about how voltage is set - if the driver is constant current it will adjust the output voltage to whatever it needs to be to maintain the set current. Within current and voltage limits of course.

Is there a reason you are going for this driver? An LM317 or LM338 would make for a suitable constant current driver and probably at a fraction of the cost.
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405nm | Banggood LT-850 | "5mW" | Review Unit | Review WIP
445nm | Sanwu Laser Pocket Series | 400mW Metered
445nm | NDB7242E Pen Build | 60mW Metered | >>Build Thread<<
450nm | LaserPointerStore - Thor H2 | 1W(?) | Review Unit | >>Review<<
488nm | Spectra Physics 163 Argon | ~30mW Metered
515nm | PL515 Pen Build | 50mW Metered | >>Build Thread<<
520nm | Laserlands 520 | 5mW | Review Unit | 3mW metered | >>Review<<
532nm | Gearbest 303 Pointer | 50mW Metered
532nm | Gearbest JD-850 Pointer | 30mW Metered (I think, need to re-test).
633nm | HeNe | 6mW
633nm | Spectra Physics 155 HeNe | <1mW >>Thread<<
650nm | Sanwu Laser Pocket Series | 200mW Metered
808nm | Melles Griot 532nm Lab Unit | No Crystals >10W | X2



Check out my Reddit Subreddit! >>/r/laserpointers<<

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Old 03-24-2016, 11:24 PM #5
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Default Re: n00b question about driver voltage

The main reason I was looking at those units was that they could drive a fair amount of power and that they had multiple safety features (both for diode and users). I also would like to be able to manage laser power via photodiode feedback rather than just by fixed current.

Thanks for the information.
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