论文部分内容阅读
本实验中,将声光调制锁模器放置在氦氖激光器中的谐振腔里,控制谐振腔中的增益,使声波的频率调制与激光器固有频率间隔一致,从而达既可以到锁模的效果,又可以增加增益,减少能量损耗。通过功率计与示波器检测出激光脉宽、脉冲周、纵模间隔等物理量,与理论值进行比较,判断激光锁模实验的效果。本实验使用的氦氖激光器腔长大于1.55m,是双面全反射腔,可以利用激光锁模技术得到纵模进行比较,从而获得单色性好的超短脉冲激光。
In this experiment, the acousto-optic modulation mode-locked device is placed in the resonant cavity of the He-Ne laser to control the gain in the resonant cavity so that the frequency modulation of the acoustic wave is consistent with the natural frequency of the laser, so as to achieve the effect of mode locking , But also can increase gain, reduce energy loss. Through the power meter and oscilloscope to detect the laser pulse width, pulse weeks, vertical mode interval and other physical quantities, compared with the theoretical value to determine the effect of laser mode-locking experiments. In this experiment, the He-Ne laser cavity length is longer than 1.55m. It is a double-sided total reflection cavity. The laser mode-locked technique can be used for longitudinal mode comparison to obtain a monochromatic ultrashort pulse laser.