The two oscillator circuits underneath are appropriate for applying crystal oscillators in collection or parallel method: Superior-repetition-amount and higher-electric power picosecond regenerative amplifier based upon an individual 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 mode-locked picosecond oscill... https://letsbookmarkit.com/story18913518/bulk-crystal-oscillator-an-overview