The two oscillator circuits beneath are suitable for using crystal oscillators in series or parallel method: Large-repetition-rate and higher-electrical power picosecond regenerative amplifier depending 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 large electric power passively manner-locked picosecond oscillator ba... https://bookmarklayer.com/story18973389/the-smart-trick-of-bulk-crystal-oscillator-that-no-one-is-discussing