▎ 摘　　要

NOVELTY - The utility model model relates to the technical field of optical fibre laser, claims a fibre laser with controllable phase shift difference, comprising an optical fibre, two beams of signal input by the optical fibre respectively input to the first port and the second port of the coupler, the signal output by the third port of the coupler is transmitted to the first port of the wavelength division multiplexer through the optical fibre, the output signal of the fourth port of the coupler is transmitted to the first port of the phase shifter through the optical fibre; the output signal of the first laser source is input to the second port of the wavelength division multiplexer; the signal output from the second port of the phase shifter is transmitted to the first graphene of the coated micro-nano optical fibre via the optical fibre; the output signal of the second laser source is input to the second graphene of the coated micro-nano optical fibre, the third port of the micro-nano optical fibre and the third port of the wavelength division multiplexer are communicated through the optical fibre; The optical fibre laser with controllable phase shift difference can flexibly adjust the phase difference of the bidirectional rotation optical field.