Electronic alignment of acousto-optic modulator for modulating a laser
    23.
    发明申请
    Electronic alignment of acousto-optic modulator for modulating a laser 失效
    用于调制激光的声光调制器的电子对准

    公开(公告)号:US20050157763A1

    公开(公告)日:2005-07-21

    申请号:US10883464

    申请日:2004-06-30

    摘要: A method and apparatus are provided to modulate a beam of laser light. An acousto-optic modulator (AOM) is positioned to receive continuous-wave (CW) laser light at an angle approximating the Bragg angle. Fine tuning of the modulation is then used to compensate for any variations in the actual angle from the Bragg angle. A photodiode provides a feedback signal that may be used to tune or adjust the operation of the AOM. The photodiode is positioned to receive laser light at the first order diffraction and provide a signal indicative of the magnitude of the first order diffraction laser light produced by the AOM. The photodiode signal is coupled to an RF frequency generator so that the RF frequency may be adjusted to vary the acoustic wave in the AOM to compensate for any variations in the Bragg angle.

    摘要翻译: 提供了一种用于调制激光束的方法和装置。 定位声光调制器(AOM)以接近布拉格角的角度接收连续波(CW)激光。 然后使用微调调制来补偿实际角度与布拉格角的任何变化。 光电二极管提供可用于调整或调整AOM操作的反馈信号。 光电二极管被定位成以一阶衍射接收激光,并提供指示由AOM产生的一阶衍射激光的幅度的信号。 光电二极管信号被耦合到RF频率发生器,使得可以调整RF频率以改变AOM中的声波以补偿布拉格角中的任何变化。