Crystal oscillators are loosely divided with the frequency they function at and whether they are elementary oscillators—work within the frequency marked over the can or at even multiples of that (overtone oscillators). We current a Nd:GdVO4 bulk crystal oscillator with >70 WTEM00 laser output according to the orthogonal thermal compensation https://www.hxcrystals.com/seokeywords/bulk-crystal-oscillator.html