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A multi-wavelength narrow-linewidth ring-cavity fiber laser system based on phase-shifting fiber grating

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: 2019-05-31
NANCHANG HANGKONG UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A multi-wavelength narrow-linewidth ring-cavity fiber laser system based on phase-shifting fiber grating
  • A multi-wavelength narrow-linewidth ring-cavity fiber laser system based on phase-shifting fiber grating

Examples

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Embodiment Construction

[0016] Implementations such as figure 1 shown. The light output from the pump laser 1 enters the erbium-doped optical fiber 3 through the wavelength division multiplexer 2 to generate population inversion. The stimulated radiation light enters the fiber Bragg grating 5, the fiber Bragg grating 6, and the 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, the phase shift fiber Bragg grating 9, and the phase shift fiber Bragg grating 10, and then most of them enter the ring cavity through the optical coupler 11, then to 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 grating corresponds to the phase shift peak of its corresponding phase shift fiber grating, that is, the reflection spectrum of fiber ...

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Abstract

The invention discloses a multi-wavelength narrow-linewidth annular cavity fiber laser system based on a phase-shifting fiber grating. The light from the optical circulator enters multiple fiber gratings in series, and the light reflected by the fiber grating enters the phase-shifted fiber grating through the circulator. The reflection peak of the fiber Bragg grating corresponds to the phase shift peak of the corresponding phase shift fiber Bragg grating, and the bandwidth of the fiber Bragg grating should be reasonably selected; the light transmitted by the phase shift fiber Bragg grating is output through the upper port of the coupler, and then enters the optical isolator, Then enter the wavelength division multiplexer to complete a cycle; then repeat the above steps; when the gain is greater than the loss, the obtained laser is output from the lower port of the coupler. The invention has the advantages of: adopting multi-phase-shifting fiber gratings and corresponding multi-fiber gratings, thereby realizing simultaneous output of multi-wavelength narrow-linewidth lasers.

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 Patents(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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