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Phase-shifted fiber bragg grating-based multi-wavelength and narrow-linewidth annular cavity fiber laser system

A phase-shifting fiber grating and fiber grating technology, which is applied to lasers, laser parts, and the structure/shape of active media, etc., can solve problems such as restricting applications, and achieve the effect of simultaneous output

Active Publication Date: 2017-09-19
NANCHANG HANGKONG UNIVERSITY
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Problems solved by technology

However, the current narrow-linewidth lasers based on phase-shifting fiber gratings are all single-wavelength solutions, which limits their application in some fields.

Method used

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  • Phase-shifted fiber bragg grating-based multi-wavelength and narrow-linewidth annular cavity fiber laser system
  • Phase-shifted fiber bragg grating-based multi-wavelength and narrow-linewidth annular cavity fiber laser system

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Embodiment Construction

[0016] Implementations such as figure 1 shown. The light output by the pump laser (1) enters the erbium-doped optical fiber (3) through the wavelength division multiplexer (2), and the particle number inversion is generated. The stimulated radiation light enters the fiber Bragg grating (5), fiber Bragg grating (6) and fiber Bragg grating (7) after passing through the optical circulator (4), and the signal reflected by these gratings passes through the phase shift fiber Bragg grating (8), phase shifting fiber grating (9), and phase shifting fiber grating (10), then most of them enter the ring cavity through the optical coupler (11), then enter the optical isolator (12), and then enter the wavelength division multiplexer (2). When the gain is greater than the loss, the laser will be output from the laser output port (13). The reflection spectrum of each fiber Bragg grating corresponds to the phase shift peak of its corresponding phase shift fiber grating, that is, the reflect...

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Abstract

The present invention discloses a phase-shifted fiber bragg grating-based multi-wavelength and narrow-linewidth annular cavity fiber laser system. The system comprises the steps of shooting the pump light to an annular cavity through a wavelength division multiplexer, and then feeding the pump light into an erbium-doped optical fiber; feeding the light shot out of the erbium-doped optical fiber into a light circulator to enter a plurality of series-connected fiber bragg gratings; and feeding the light reflected back by the fiber gratings into a phase-shifted optical fiber grating through the circulator. The reflection peak of the fiber gratings is corresponding to the phase-shifted peak of the corresponding phase-shifted fiber grating, and the bandwidth of the fiber gratings is reasonably selected. The light transmitted out of the phase-shifted fiber grating is input into the upper port of a coupler, and then enters an optical isolator. After that, the light enters the wavelength division multiplexer, so that one cycle is completed. The above steps are repeated. When the gain is greater than the loss, the obtained laser is outputted through the lower port of the coupler. According to the technical scheme of the invention, multiple phase-shifted optical fiber gratings and corresponding multi-fiber gratings are adopted, so that multi-wavelength and narrow-linewidth lasers can be simultaneously outputted.

Description

technical field [0001] The invention relates to a multi-wavelength narrow-linewidth laser, in particular to a multi-wavelength narrow-linewidth ring-cavity fiber laser system based on a phase-shifting fiber grating. Background technique [0002] The invention is a multi-wavelength narrow-linewidth laser designed for the multiplexing problem in phase-shift fiber grating sensing. [0003] In many application areas, multi-wavelength narrow-linewidth lasers are required. However, the current narrow-linewidth lasers based on phase-shifting fiber gratings are all single-wavelength solutions, which limits their applications in some fields. [0004] Based on this, the present invention proposes a multi-wavelength narrow-linewidth ring-cavity fiber laser system using multi-fiber gratings and phase-shifting fiber gratings. The multi-wavelength narrow-linewidth ring-cavity fiber laser system proposed by the present invention can simultaneously output multi-wavelength narrow-linewidth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067
CPCH01S3/0675H01S3/06791
Inventor 万生鹏何兴道史久林陈瑞麟
Owner NANCHANG HANGKONG UNIVERSITY
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