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Alien Laser 488nm Build!




ManCave

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Oct 28, 2019
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That beam is gorgeous!
Well done my man!... one of these days (read, in a few years ) I hope to build a laser as good as yours.
Cheers!
 

paul1598419

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Did you have the wavelength of that diode measured? I have quite a bit of experience with these diodes and if you can tell me the current you drive it with I can give you an approximate power level. Looks like you used a longer focal length lens as the beam diameter at the aperture is larger than most.
 

paul1598419

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Oh, why so low? Mine is set at 275 mA. Or is that a typo? If not, that is just about 2X threshold.
 

Alien Laser

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I set it low so the wavelength don't change much i have another set at 130mA ( 5mA +/- ) and i can see a difference in wavelength i take some pictures tomorrow 🛸
 

paul1598419

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I set it low so the wavelength don't change much i have another set at 130mA ( 5mA +/- ) and i can see a difference in wavelength i take some pictures tomorrow 🛸
These diodes tend to measure between 487nm and 493nm, so you can get a difference in its color depending on its wavelength. But, these diodes don''t tend to shift much by current. They do with heat, so a good heat sink is the most important if you want to keep the WL stable.
 




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