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Thread: green current

  1. #1
    Join Date
    Dec 2007
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    NorCal / Western Caribbean
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    710

    Default green current

    Hi all,

    I have an old 50mW green laser that has no driver. I want to connect it up to a Flexmod. Any idea of the current I should start the driver at?

    Cheers
    Rich

  2. #2
    Join Date
    Jun 2010
    Location
    Australia
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    3,729

    Default

    Most 50mW DPSS modules run around 150-200mA current to the IR LD.

    Start at 100mA and slowly bump up, the output should increase proportionally to a point, then start to drop off. You want to be just before the peak of the curve.

    You may notice that once you go "over" the peak, reducing the current will not provide as bright an output due to overheating the crystals.

    Make sure the module is adequately heatsinked first.
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  3. #3
    Join Date
    Dec 2007
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    NorCal / Western Caribbean
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    Default

    Thanks, I'll give it a go later.

    Cheers
    Rich

  4. #4
    Join Date
    Sep 2008
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    Orlando, Florida
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    Default

    Be careful. I've blown up my share of those lasers. I count 8 sitting here. I started replacing just the pump diode after a while.

    Lazerjock

  5. #5
    Join Date
    Dec 2007
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    NorCal / Western Caribbean
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    Default

    DOH, too late - it went pop. Anyone have a source for 12mm green modules?

    Cheers
    Rich

  6. #6
    Join Date
    Jun 2010
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    Australia
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    Default

    The dealexteme.com 50 & 200mW modules are ok for the price. Look under "DIY" in the lasers section.
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  7. #7
    Join Date
    Dec 2007
    Location
    NorCal / Western Caribbean
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    710

    Default

    Thanks, I'll have a look shortly.

    Cheers
    rich

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