Crystal oscillators are loosely divided via the frequency they work at and whether or not they are elementary oscillators—work in the frequency marked around 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 https://listingbookmarks.com/story19008596/a-review-of-bulk-crystal-oscillator