Multi-wavelength Brillouin-erbium-doped fiber laser based on random distribution feedback

Abstract

The invention discloses a multi-wavelength Brillouin-erbium-doped fiber laser based on random distribution feedback, and belongs to the technical field of fiber lasers. The multi-wavelength Brillouin-erbium-doped fiber laser based on the random distribution feedback is composed of a Brillouin pumping laser source, an erbium-doped fiber amplifier, an isolator, a first circulator, an erbium-doped fiber pumping laser source, a wavelength division multiplexer, erbium-doped fibers, a second circulator, single mode fibers and random distribution feedback fibers. According to the multi-wavelength Brillouin-erbium-doped fiber laser based on the random distribution feedback, the first circulator, the wavelength division multiplexer, the erbium-doped fibers, the second circulator and the single mode fibers form an annular structure which form a semi-open resonant cavity together with the random distribution feedback fibers, Brillouin pumping laser and feedback optical signals are amplified through the erbium-doped fiber amplifier, therefore amplification of the feedback optical signals can be achieved to the maximum extent, laser oscillation is formed, and multi-wavelength random laser output is finally achieved.

Description

technical field [0001] The invention relates to a random fiber laser, in particular to a multi-wavelength fiber laser based on random distribution feedback and Brillouin-erbium-doped fiber hybrid gain, and belongs to the technical field of fiber lasers. Background technique [0002] Random lasers are a class of lasers based on random distribution feedback, which utilize the multiple scattering effect in disordered media to achieve random distribution feedback. Conventional random lasers often have shortcomings such as laser output angle dependence and high threshold power. The optical fiber has excellent two-dimensional confinement, and the random fiber laser thus obtained can effectively overcome the problems of random laser output angle dependence and high threshold power. Random fiber lasers are mainly divided into three categories, the first category is based on filling dispersed TiO 2 The photonic crystal fiber of the rhodamine 6G solution of nanoparticles uses side p...

AI Technical Summary

Problems solved by technology

Random fiber lasers are mainly divided into three categories, the first category is based on filling dispersed TiO 2 The photonic crystal fiber of the rhodamine 6G solution of nanoparticles uses side pumping to obtain random laser output. Random laser output, but the preparation is complicated, the output wavelength is small, and the wavelength interval is not fixed; the third type is based on Rayleigh backscattering, because Rayleigh backscattering is weak, the current method mainly uses Raman effect to Scattering signals are amplified, but random fiber lasers based on Raman effect gain have disadvantages such as high laser threshold power, low conversion efficiency, and few output wavelengths