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Old 10-30-2010, 02:46 AM #1
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Default Yet another guy with a 445

Hello everyone.

I am not too familiar with laser diodes, ive built a few tube lasers before, but this is a project that ive started to work on a while ago, using a c***o 445nm (the 1000mW ones) diode.

I am using an LM317 driver for this, but before I light it up for the first time, I wondered if I am doing everything correctly:

the voltage input is 4.8V, current is set to 900mA, ive been told that this is just right to run the diode (although under 1000mW), but I would greatly appreciate a second opinion as to what current/voltage to run this diode at.
also, what is the threshold current for these diodes? 250mA?

Thank you for your time.



Last edited by GBD; 10-30-2010 at 04:04 AM.
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Old 10-30-2010, 03:22 AM #2
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Default Re: Yet another guy with a 445

Do not use the name "Ca$10" related to your diode. There is a legal reason for this.

Depending on "your" diode and heatsinking, you might be able to run 1.2 Amps safely but be sure the PS is stable.

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Old 10-30-2010, 04:06 AM #3
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Default Re: Yet another guy with a 445

Thank you for the responce,

hmm... I googled that, and it became aparent why not to say the name, edited.

one question I have though, what are typical voltage ranges for this diode to operate at?
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Old 10-30-2010, 04:21 AM #4
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Default Re: Yet another guy with a 445

About 4.35 volts seems safe with my data. You can go up carefully to 4.4 volts.

HMike

Do not exceed 1.6 Amps unless you want to tempt fate as I have done. 1.8 Amps has killed a couple of my diodes and I'm the diode killer -- or maybe one of them !!
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Old 10-30-2010, 09:32 PM #5
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Default Re: Yet another guy with a 445

Can I get link about not saying the name ? My google skills were not good enough.
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Old 10-30-2010, 10:53 PM #6
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Default Re: Yet another guy with a 445

That was as good as advertising for WL. "Oh if I ever wanted one I better get it now before they get shut down"
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Old 11-01-2010, 03:34 AM #7
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Default Re: Yet another guy with a 445

That was retarded in retrospect :/ Link removed.
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Old 11-01-2010, 04:10 AM #8
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Default Re: Yet another guy with a 445

When I recorded some info for 130's I came up with these figures.
at 650ma drive current to the diode the adverage voltage was 4.79 volts and Po was 331mW with no lens.
for the 140 I have found at 700ma drive current to the diode the adverage voltage was 5.26 volts and adverage Po
was 475mW with no lens.


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one question I have though, what are typical voltage ranges for this diode to operate at?
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