The two oscillator circuits under are well suited for making use of crystal oscillators in collection or parallel mode: Superior-repetition-rate and large-electricity 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，隔一定的距离重复出现，这种周期性规律是 A high power passively manner-locked picosecond oscillator base... https://www.hxcrystals.com/seokeywords/bulk-crystal-oscillator.html