Crystal oscillators are loosely divided by the frequency they function at and whether they are elementary oscillators—work at the frequency marked within the can or at even multiples of that (overtone oscillators). Significant-repetition-amount and superior-energy picosecond regenerative amplifier dependant on a single bulk Nd:GdVO4 crystal 中原子或分子的排列具有三维空间的周期性，隔一... https://www.hxcrystals.com/seokeywords/bulk-crystal-oscillator.html