Novel multi-wavelength Brillouin-Raman fiber laser

Abstract

The invention discloses a novel multi-wavelength Brillouin-Raman fiber laser which relates to the technical field of fiber lasers, and aims to provide a multi-wavelength Brillouin-Raman fiber laser capable of producing various wavelengths. The technical scheme of the invention is as follows: the novel multi-wavelength Brillouin-Raman fiber laser comprises a Brillouin pumping laser source, a circulator, a 3db coupler, a single mode fiber, a wavelength division multiplexer, a Raman pumping laser source, a dispersion compensation fiber and an isolator. The novel multi-wavelength Brillouin-Raman fiber laser has the beneficial effects that rayleigh scattering in the long-distance single mode fiber can provide a random distributed feedback function, and can reflect part of light to the dispersion compensation fiber again, thereby effectively improving the laser scattering efficiency, and producing more power-equalized multi-wavelength outputs; in addition, the rayleigh scattering in the long-distance single mode fiber has the effect of narrowing the laser line width by pressing, so that the laser line width is narrow, and further spectral reshaping on multi-wavelength lasers can be realized so as to achieve the effect of equalized line width between adjacent channels.

Description

technical field [0001] The invention belongs to the technical field of fiber lasers, in particular to a multi-wavelength Brillouin-Raman fiber laser. Background technique [0002] Multi-wavelength fiber lasers have important applications in fiber optic communications, fiber optic sensing, and characterization of optical devices. The first thing that was put into research was the multi-wavelength erbium-doped fiber laser made by using the gain characteristics of erbium-doped fiber. Later, a comb filter was used to form multi-wavelength resonance on the basis of multi-wavelength erbium-doped fiber laser. With the development of modern optical fiber communication, the demand for high-speed and large-capacity optical communication is increasing, and the existing erbium-doped fiber lasers are far from meeting the needs of social development. Dense wavelength division multiplexing (DWDM) is a feasible expansion solution , which requires light sources with multiple wavelengths...

AI Technical Summary

Problems solved by technology

Raman pumping schemes using multiple wavelengths can further expand the flat bandwidth, but at the same time lead to increased system cost and complexity

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