The 2 oscillator circuits down below are ideal for employing crystal oscillators in collection or parallel mode: High-repetition-rate and high-energy picosecond regenerative amplifier according to 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 Structure of resonators to the determination on the temperature coefficients of ... https://dirstop.com/story22128840/rumored-buzz-on-bulk-crystal-oscillator