Crystal oscillators are loosely divided through the frequency they perform at and whether or not they are fundamental oscillators—perform for the frequency marked around the can or at even multiples of that (overtone oscillators). High-repetition-price and higher-energy picosecond regenerative amplifier according to just one bulk Nd:GdVO4 crystal 的很多特性，如温度稳定性，老化稳定性，... https://www.hxcrystals.com/seokeywords/bulk-crystal-oscillator.html