Recent content by atomd

Usually you use continuum to generate just seed and then get power from OPA. If you don't mind narrowing the bandwidth to just a few nm and you have Q-switched laser that can be synchronized to mode-locked one then you can do SFG. 532nm + 400 nm gives you deep UV. 532nm + 800nm or 1064 + 400nm...

I love your absolute confidence while not understanding basic rules of quantum mechanics

Confocal setup is indeed significant better, but even the finite beam waist + finite rotation speed makes modulation take some time. If we assume reasonable 80um waist and take thorlabs chopper as an example (100 rotations per second, 100mm wheel diameter) then outside of the wheel moves at...

yes, exactly. And getting sharp edges on chopper isn't trivial.

I think you totally underestimate requirements of chopper needed to modulate the entire beam <<1us

Well let's do some number crunching. You want to reflect light form mirror 20m away. That gives you 40m optical path length, which translates to roughly 120ns delay. To be able to see any delay you'd want your driving edge to be significantly faster than that, let's say 40ns. Because of both...

Sounds totally doable. Probably could get it to 200-300W with short enough pulse, the driver would be a pain though.

Idk where do you come from but in lab every other laser driver we have pulses them at absurd powers with subnanosecond pulse widths.

Pulsed. It's not that hard

that's probably one of the worst ways of pumping Pr lasers in a long time.

Anyone has any spare unit they're willing to sell?

thorlabs, edmund optics & newport

Yes, tuning over narrow ranges, especially with periodically poled crystals can be achieved with just etalon. But most vis-NIR OPOs have much wider tuning ranges and work on LBO/BBO, which can't be periodically poled. LBO can also be thermally tuned in some range, especially if it's NCPM but...

Hi, I'm looking if anyone has any photos of insides of Optek (or any other manufacturer) optical parametric oscillator? I'm curious about specific tuning systems used in practice so any other references would be welcome too.

https://www.ebay.com/itm/134043171833?_trksid=p4375194.c101775.m47269 10W green