Crystal oscillators are loosely divided by the frequency they perform at and whether or not they are elementary oscillators—work with the frequency marked around the can or at even multiples of that (overtone oscillators). Substantial-repetition-rate and substantial-ability picosecond regenerative amplifier determined by only one bulk Nd:GdVO4 crystal PDF 中原子或分子的排列具有三维空... https://www.hxcrystals.com/seokeywords/bulk-crystal-oscillator.html