All-fiber pulsed fiber laser with composite chamber

An all-fiber pulsed fiber laser device with a composite chamber comprises a semiconductor laser pumping source driven by a semiconductor laser pumping source driving module, a fiber wavelength division multiplexer, a gain medium fiber, a first optoisolator, a photo-coupler, a pigtailed photoswitch driven by a photoswitch driving module, and a second optoisolator, wherein an output terminal of the semiconductor laser pumping source is connected with a short wavelength input terminal of the fiber wavelength division multiplexer, an output terminal of the fiber wavelength division multiplexer is connected with an input terminal of the photo-coupler by successively passing through the gain medium fiber and the first optoisolator, an output terminal of the photo-coupler serves as an output terminal of the laser, one end of the pigtailed photoswitch is connected with a long wavelength input terminal of the fiber wavelength division multiplexer via the second optoisolator, a cascading interference chamber is arranged between the photo-coupler and the pigtailed photoswitch, an input terminal of the cascading interference chamber is connected with a feedback output terminal of the photo-coupler, and an output terminal of the cascading interference chamber is connected with the other end of the pigtailed photoswitch.