The 2 oscillator circuits beneath are suited to utilizing crystal oscillators in sequence or parallel manner: Superior-repetition-rate and higher-electrical power picosecond regenerative amplifier based upon just 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 large energy passively mode-locked picosecond oscillator depending ... https://socialfactories.com/story4413512/little-known-facts-about-bulk-crystal-oscillator