Crystal oscillators are loosely divided via the frequency they do the job at and whether or not they are fundamental oscillators—operate in the frequency marked over the can or at even multiples of that (overtone oscillators). We present a Nd:GdVO4 bulk crystal oscillator with >70 WTEM00 laser output determined by https://www.hxcrystals.com/seokeywords/bulk-crystal-oscillator.html