Brillouin multi-wavelength erbium-doped fiber laser with ultra-narrow linewidth

An erbium-doped fiber and laser technology, applied in the direction of lasers, laser components, phonon exciters, etc., can solve the problems of phase noise and line width deterioration, the increase of system demodulation complexity, and the channel is prone to crosstalk, etc., to achieve strong Line width compression effect, easy to obtain, compact effect

Active Publication Date: 2015-05-13
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

However, when multi-wavelength lasers with wavelength intervals of 10 GHz and 20 GHz are used as wavelength division multiplexing light sources, the complexity of system demodulation increases, crosstalk between channels is prone to occur, and the actual application value is reduced.
Moreover, the laser requires a long single-mode fiber as the gain medium, the output is prone to mode hopping, and the phase noise and line width deteriorate
However, there have been no reports of multi-wavelength ultra-narrow linewidth BEFLs based on ultra-short cavity structures.

Method used

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  • Brillouin multi-wavelength erbium-doped fiber laser with ultra-narrow linewidth

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Embodiment Construction

[0022] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, and are not intended to limit the present invention.

[0023] The present invention proposes a multi-wavelength ultra-narrow linewidth Brillouin erbium-doped fiber laser, which consists of a pump laser 1 with N different wavelength laser outputs, an N×1 coupler 2, a circulator 3, and a A wavelength division multiplexer 4, an erbium-doped fiber pump light source 5, a section of erbium-doped fiber 6, an optical filter 7 and a fiber coupler 8, the coupling mode of the fiber coupler 8 is 1 * 2, so The N×1 coupler 2 has N input ports and an output port, and its N input ports are respectively port 21, port 22, ..., port 2N, and the N laser outputs 11, 12 of the pump laser 1 , ..., 1N are respectively connected to the port 21, port 22,...

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Abstract

The invention discloses a Brillouin multi-wavelength erbium-doped fiber laser with ultra-narrow linewidth and belongs to the technical field of a fiber laser. The laser is composed of N Brillouin pumped laser sources with different-wavelength outputs, N*1 couplers, circulators, wavelength division multiplexers, erbium-doped fibers, erbium-doped fiber pump light sources, optical filters and optical fiber couplers, wherein N is no less than two. The Brillouin multi-wavelength erbium-doped fiber laser has the simple structure and ultra-narrow linewidth, thus the laser plays an important role in cost reduction and performance improvement of a large-scale wavelength division multiplexing system.

Description

technical field [0001] The invention relates to a fiber laser, in particular to a multi-wavelength ultra-narrow linewidth Brillouin erbium-doped fiber laser (BEFL). Background technique [0002] Multi-wavelength ultra-narrow linewidth fiber lasers are widely used in wavelength division multiplexing interferometric fiber optic sensing systems, and their ultra-narrow linewidth characteristics are an important development direction of fiber lasers at present. They are extremely important for reducing system noise and improving system detection sensitivity. important role. The current multi-wavelength fiber lasers are mainly erbium-doped fiber lasers and nonlinear fiber lasers. [0003] Inserting a comb filter or an interferometer filter in an erbium-doped fiber laser can obtain multi-wavelength output. However, the uniform expansion characteristics of erbium fiber limit its difficulty in achieving stable multi-wavelength output. It is solved by liquid nitrogen cooling erbium...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067H01S3/30H01S3/0941
Inventor 孟洲陈默王建飞陈伟陈羽凃晓波孙世林孙乔张学亮宋章启
Owner NAT UNIV OF DEFENSE TECH
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