Crystal oscillators are loosely divided via the frequency they function at and whether or not they are basic oscillators—do the job on the frequency marked on the can or at even multiples of that (overtone oscillators). Large-repetition-level and higher-electricity picosecond regenerative amplifier based on 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... https://bookmark-group.com/story4534045/helping-the-others-realize-the-advantages-of-bulk-crystal-oscillator