Acousto-optic Modulator for High-power Pulsed Fiber Laser Abstract : The present invention relates to an a cousto-optic modulator for high-power pulsed fiber lasers , including an input pigtail, a collimating lens, an acousto-optic device, a focusing lens, and an output pigtail. The input pigtail is placed at 3.7° with the horizontal plane, and the output tail The fiber and the horizontal plane are placed at 0° or 3.7°, the input pigtail and collimating lens are installed together to form an input fiber collimator, and the output pigtail and focusing lens are installed together to form an output fiber collimator, and then the input, The output fiber collimator and the acousto-optic device are assembled as a whole; a narrowband filter can be placed between the acousto-optic device and the output fiber collimator, and the input fiber collimator and output fiber collimator can be combined into one Fiber collimator, add a narrow band high reflector. The invention effectively improves the