optical parametric oscillation

例句：

1. 1. The optical parametric oscillator is a device that can generate ultra-high frequency pulses.
   光学参量振荡器是一种可以产生超高频脉冲的设备。
2. 2. The optical parametric oscillator has been widely used in laser technology.
   光学参量振荡器在激光技术领域得到了广泛应用。
3. 3. The optical parametric oscillator can be used to measure the refractive index of materials.
   光学参量振荡器可以用来测量材料的折射率。