Crystal oscillators are loosely divided through the frequency they function at and whether or not they are essential oscillators—get the job done with the frequency marked within the can or at even multiples of that (overtone oscillators). We existing a Nd:GdVO4 bulk crystal oscillator with >70 WTEM00 laser output according https://bookmarkforest.com/story18885055/the-2-minute-rule-for-bulk-crystal-oscillator