Old 07-26-2013, 01:44 AM #1
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Default 532nm wavelength - can it change?

Hey everyone,
A brief question concerning 532nm DPSS lasers. First off, I just hardly understand how it works, and I may still be incorrect: 1064nm diode goes through a crystal or two, which double the frequency, turning it into 532nm light. Now for the question.
The wavelength emitted by a laser diode changes with varying conditions. I assume this to be true for IR diodes as well. So, as (let's say) 1066nm light travels through the crystals, is the frequency doubled as well?

If so, wouldn't these crystals do so for light of any frequency, and they could be applied for 589nm, 473nm, and everything else?
I've TL;DR'd on even the simplest explanations of 589nm, so I know this is not the case.

If not, why do I have green light consistently exiting the aperture no matter what (within reason) voltage, current, or temperature the laser is operating under?

Is the transmittance/doubling effect of these crystals a sort of Gaussian distribution across frequency of entering light?

Thanks everyone!


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Old 07-26-2013, 01:50 AM #2
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Default Re: 532nm wavelength - can it change?

Its an 808 pump diode. And although the wavelength can change due to temp the crystals still proccess very specific wavelengths. So if the pump shifts outside of 808. Say 810 its still emiting some 808. If it shifts to far outside of this you will get nothing out. The closer to 808 the more 532 you get.
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Old 07-26-2013, 01:58 AM #3
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Default Re: 532nm wavelength - can it change?

Oh, I misread the default 532nm diagram. Ouch.
Thanks for the response!
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