Crystal oscillators are loosely divided from the frequency they perform at and whether or not they are elementary oscillators—do the job at the frequency marked around the can or at even multiples of that (overtone oscillators). We existing a Nd:GdVO4 bulk crystal oscillator with >70 WTEM00 laser output determined by https://ariabookmarks.com/story4657193/the-smart-trick-of-bulk-crystal-oscillator-that-no-one-is-discussing