1 watt fiber coupled IR laser

• Apr 1, 2010

• #1

H

HazzWold1993

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>1 Watt Fiber Coupled IR Laser Diode Burns! made by SDL - eBay (item 390062848432 end time Apr-25-10 17:35:21 PDT)

With this laser it quotes in the description
"Two "D" size batteries with a current limiting resistor would do fine."
Unless its different with these diodes isnt a resistor for current limiting in a laser stupid? or would it work, or would i need a driver..

 

• Apr 1, 2010

• #2

hugo999999

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yes you would need some form of current limiting, all drivers use resistors to limit current so im not sure what you mean. you could make a DDL driver with a lm350 to limit the current

 

• Apr 2, 2010

• #3

x90z75ek

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It's better to use a driver. It's the same with all laser diodes. You can either use a DDL driver or 3x AMC7135 drivers. I remember Billg519 once told me he used 8x AMC7135 drivers to provide 2800mA to an IR laser.

 

• Apr 2, 2010

• #4

hugo999999

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it would be more sensible to use a DDL driver but use the lm350 regulator instead of the LM317, the LM350 can output up to 6 amps i think

 

• Apr 2, 2010

• #5

x90z75ek

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hugo999999 said:

it would be more sensible to use a DDL driver but use the lm350 regulator instead of the LM317, the LM350 can output up to 6 amps i think

Click to expand...

You're wright. It's easier to build a DDL driver instead of 3x AMC drivers. Though there's no need for anywhere near 6 amps since it's a 1W IR laser.