Ultra-narrow-linewidth nonlinear gain amplification multi-wavelength fiber laser

Abstract

The invention provides an ultra-narrow-linewidth nonlinear gain amplification multi-wavelength fiber laser, belongs to the technical field of photoelectric information and aims at solving the problem that an existing multi-wavelength fiber laser is large in output laser linewidth, complicated in system and poor in stability. The technical scheme is that light emitted by a high-power narrow-linewidthBrillouin pump is irradiated into a port a of an input / output circulator, and a port b of the input / output circulator is connected with a port j of a second coupler. A port m of the second coupler is connected with a polarization controller, and a port k and a port n are respectively connected with a port I and a port o of a single mode fiber. The polarization controller is connected with a reflection circulator. The other two ports of the reflection circulator are connected. A port c of the input / output circulator is connected with an Er-doped fiber, the Er-doped fiber is further connected with a first coupler, and the other two ports of the first coupler are connected. A port d of the input / output circulator is an output port. The ultra-narrow-linewidth nonlinear gain amplification multi-wavelength fiber laser has wide application prospect in the fields of dense wavelength division multiplexing optical communication systems, distributed optical fiber sensing and microwave photonics.

Description

technical field [0001] The invention relates to a fiber laser. Aiming at the structural characteristics of a C-band multi-wavelength Brillouin fiber laser, a C-band ultra-narrow C-band laser based on a high-power narrow-linewidth Brillouin pump light source and an unpumped erbium-doped fiber is proposed. The invention relates to a multi-wavelength fiber laser with line width and non-linear gain amplification, which belongs to the field of optoelectronic information technology. Background technique [0002] Due to the advantages of high efficiency, low threshold, narrow linewidth, compact size, and good compatibility with transmission fibers, multi-wavelength fiber lasers have important applications in dense wavelength division multiplexing systems (DWDM), especially in Brillouin multi-wavelength lasers. Due to its ultra-narrow linewidth advantages, wavelength fiber lasers have potential application prospects in many technical fields such as high-precision spectral analysis, ...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problems of wide output laser line width, complex system and poor stability of multi-wavelength fiber lasers in the prior art, the present invention proposes a high-power narrow-line width based on the structural characteristics of C-band multi-wavelength Brillouin fiber lasers. C-band ultra-narrow linewidth wireless linear gain-amplified multi-wavelength fiber laser with Brillouin pump source and unpumped Erbium-doped fiber

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