A Multiwavelength Random Fiber Laser Based on Hybrid Gain

Abstract

The invention discloses a multi-wavelength random fiber laser based on mixed gain, belonging to the technical field of fiber lasers, comprising a Brillouin pump laser source, an erbium-doped fiber pump laser source, a first circulator, a second circulator, a wavelength It consists of multiplexer, erbium-doped optical fiber, optical fiber producing Brillouin effect and randomly distributed feedback optical fiber. In the invention, the first circulator, the wavelength division multiplexer, the erbium-doped optical fiber, the optical fiber producing the Brillouin effect, and the second circulator form a ring structure, and form a semi-open resonant cavity together with the randomly distributed feedback optical fiber to realize The laser is oscillated, and the light is amplified with mixed gain using stimulated Brillouin scattering and an erbium-doped fiber. The laser has the advantages of simple structure, low threshold power, multiple output wavelengths, short and equal wavelength intervals.

Description

technical field [0001] The invention relates to a random fiber laser, in particular to a randomly distributed feedback fiber laser based on stimulated Brillouin scattering and erbium-doped fiber mixed 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. Therefore, three-dimensional bulk random lasers often have disadvantages such as laser output angle dependence and high threshold power. Optical fibers have excellent two-dimensional confinement, which 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 pumping to ...

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 The scattered signal is amplified, but it has the disadvantages of high laser threshold power, low conversion efficiency, and few output wavelengths.

Images