Old 01-17-2014, 04:26 PM #1
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Default 25W laser diode schematics

I found this diode on amazon OSRAM - SPLPL90 - DIODE, LASER, 905NM, 25W
Please spare me the safety speech, I know this is an extremely powerful laser. Would someone please assist me with making a schematic for it? I don't know the values needed for the battery(s), resistors, or capacitors. I'm not very good with the math aspect of electronics. Thank you in advance!



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Old 01-17-2014, 04:32 PM #2
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Default Re: 25W laser diode schematics

40a current and 11rad divergence. Wtf?
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Old 01-17-2014, 04:34 PM #3
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Default Re: 25W laser diode schematics

- Pic of a crummy looking LED
- $65
- Seems legit.
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Old 01-17-2014, 05:09 PM #4
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Default Re: 25W laser diode schematics

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Old 01-17-2014, 05:22 PM #5
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Default Re: 25W laser diode schematics

I'm sorry to break this to you, but thats totally fake.

1) That picture looks like an LED(?), laser diodes have 3 short pins, not 2 long legs
2) Pretty sure the most powerful laser diodes you can get (easily) are rated at 3.5 Watts
3) Even if it was 25 Watts, it would cost way more than 65$\

Also good luck finding portable batteries that can deliver 40 Amps.
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Old 01-17-2014, 06:03 PM #6
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Default Re: 25W laser diode schematics

There you go: https://www.jameco.com/Jameco/Produc...DS/2192763.pdf
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Old 01-17-2014, 06:27 PM #7
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Default Re: 25W laser diode schematics

Huh. Well color me surprised. But nowhere on that Amazon product page does it say its pulsed.

So it is 25 watts...for 1 to 100 nanoseconds.
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Old 01-17-2014, 10:53 PM #8
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Default Re: 25W laser diode schematics

These have been discussed many, many times in the past. They are for rangefinders or similar and average 10-30mW. It is not what you want.
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Old 01-18-2014, 03:48 AM #9
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Default Re: 25W laser diode schematics

10^-7 sec long pulses of 30W, at 0.1% duty cycle.
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Old 01-18-2014, 04:17 AM #10
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Default Re: 25W laser diode schematics

Quote:
Originally Posted by Blarg King View Post
I'm sorry to break this to you, but thats totally fake.

1) That picture looks like an LED(?), laser diodes have 3 short pins, not 2 long legs
2) Pretty sure the most powerful laser diodes you can get (easily) are rated at 3.5 Watts
3) Even if it was 25 Watts, it would cost way more than 65$\

Also good luck finding portable batteries that can deliver 40 Amps.
1) I've worked with laser diodes with 4 legs, 3 legs, and 2 legs. The 685nm diodes have just that, 2 long legs.

Also c-mounts have no legs, and TO3's have like 8 legs or something (don't quote me on that).

Legs means nothing really. I have seen 5.6mm diodes with 2-4 legs



2) You can easily get diodes 5-10W and beyond in 808nm. Easily available, and not even terribly expensive. You can get a 10W 808nm here for about the same cost as a well made 445nm full laser.

Just saying, best to not generalize.




3) I agree
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