The 2 oscillator circuits underneath are well suited for employing crystal oscillators in collection or parallel method: Higher-repetition-amount and higher-electric power picosecond regenerative amplifier according to only one 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 higher electrical power passively method-locked picoseco... https://www.hxcrystals.com/seokeywords/bulk-crystal-oscillator.html