The 2 oscillator circuits down below are suitable for making use of crystal oscillators in collection or parallel manner: High-repetition-amount and high-ability 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 electrical power passively mode-locked picosecond oscillator ... https://bookmarktune.com/story18862116/what-does-bulk-crystal-oscillator-mean