Crystal oscillators are loosely divided because of the frequency they work at and whether they are essential oscillators—operate at the frequency marked to the can or at even multiples of that (overtone oscillators). We existing a Nd:GdVO4 bulk crystal oscillator with >70 WTEM00 laser output based on the orthogonal thermal https://www.hxcrystals.com/seokeywords/bulk-crystal-oscillator.html