[time-nuts] where can I purchase 794.7 nm VCSEL for building CPT rubidium clock?

Mark Sims holrum at hotmail.com
Mon Jun 11 03:43:36 EDT 2018


Well, no.  Green laser pointers convert a rather high power 800 nm laser to 1600 nm in one crystal then divide it to 533 nm in another one.   The physics and manufacturing of them is best described as black magic.  They are cheap because China developed the process to grow the crystals in bulk  and crank out zillions of them for consumer products. 

I suspect that a 1600-ish nm to 800-ish nm converter is not a stock consumer-quantity device and will cost a pretty penny or two... like a red/IR laser diode can be had for 50 cents and a telecom VCSEL diode can be $500.
 
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> It cannot be too much, given the fact that these are used in
green laser pointers.



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