Optical filtering device, laser radar apparatus, and laser beam quality improvement method

The invention relates to an optical filtering device, a laser radar device and a laser beam quality improvement method. An optical filtering apparatus is disclosed. The optical filtering device comprises a wavelength sensing module and an optical filter. The wavelength sensing module is configured to receive a portion of an input laser beam and output a sensing electrical signal indicative of a central wavelength of the input laser beam. A passband of the optical filter has a center wavelength set based on the sensing electrical signal that matches a center wavelength of the input laser beam. The optical filter is configured to optically filter another portion of the input laser beam to output a filtered laser beam. 本公开涉及光学滤波装置、激光雷达设备和激光光束质量改善方法。具体公开了一种光学滤波装置。光学滤波装置包括波长感测模块和光学滤波器。波长感测模块被配置为接收输入激光光束的一部分并输出指示输入激光光束的中心波长的感测电信号。光学滤波器的通带具有基于感测电信号而设置的与输入激光光束的中心波长匹配的中心波长。光学滤波器被配置为对输入激光光束的另一部分进行光学滤波以输出经滤波的激光光束。