Broadband Tunable Multiwavelength Brillouin Fiber Laser

Abstract

A broadband tunable multi-wavelength Brillouin fiber laser belongs to the field of fiber lasers and aims to solve the problem that the present multi-wavelength Brillouin fiber laser can not adjust the output wave constant. The technical scheme is as follows: a tunable Brillouin pumping is connected with an input / output circulator; the input / output circulator is connected with a coupler and an isolator; all output light is output via the isolator; the coupler is connected with a polarization controller; the polarization controller is connected with a wavelength division multiplexer, and the polarization controller can tune polarization loss of signals in a cavity to realize tuning of the wave constant of output signals; the wavelength division multiplexer is connected with an Er-doped fiber; a 980 nm pump laser enters into the Er-doped fiber to produce gain and amplify light signals in the cavity through the wavelength division multiplexer; the Er-doped fiber is connected with the coupler; the coupler is connected with a monomode optical fiber; the monomode optical fiber is connected with a reflective circulator; and two ports of the reflective circulator are connected for reflecting transmission light in the monomode optical fiber.

Description

technical field [0001] The invention belongs to the technical field of fiber lasers, in particular to a broadband tunable multi-wavelength Brillouin fiber laser. Background technique [0002] The application of multi-wavelength fiber lasers in wavelength division multiplexing systems (WDM) reduces the large demand for semiconductor lasers in network communication systems, further simplifies the complexity of existing WDM fiber optic communication networks, expands the application range, and reduces system costs. application cost and improve system reliability. It also has broad application prospects in distributed optical fiber sensing systems. [0003] The Brillouin erbium-doped fiber laser uses the stimulated Brillouin scattering effect in the fiber to generate multi-order Stokes light, and has the advantages of multiple output wavelengths, narrow linewidth, tunability, and simple structure. [0004] In order to generate more output wavelengths, it is necessary to meet t...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem that the Brillouin multi-wavelength fiber laser in the prior art lacks an effective adjustment structure, the output multi-wavelength range can only be tuned by a tunable wavelength pump source, and the number of output wavelengths cannot be flexibly adjusted. A broadband tunable multi-wavelength Brillouin fiber laser with an erbium-doped fiber amplifier and a polarization adjustment structure embedded in a Sagnac ring is proposed to achieve broadband tuning in multiple wavelength ranges and flexible adjustment of the number of output wavelengths

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