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