Offset filtering mode-locked laser capable of self-oscillation and use method thereof

The invention discloses an offset filtering mode-locked laser capable of self-oscillation. The offset filtering mode-locked laser comprises a resonant cavity, and the resonant cavity is connected with two pumping sources and a fiber bragg grating tuning device. According to the laser, by adjusting the fiber grating tuning device, the central wavelength and bandwidth of a reflection spectrum of the first fiber grating are changed, and finally mode-locked pulses are generated in the resonant cavity to achieve the effects of stability, reliability and self-oscillation; according to the device, self-oscillation can be realized only by adjusting the fiber bragg grating tuning device, external excitation does not need to be introduced, the use condition is simplified, and the device is suitable for various application occasions and has the characteristic of portability. The invention discloses a use method of an offset filtering mode-locked laser capable of self-oscillation. The method is simple to operate and easy