Distributed Bragg reflection type single frequency optical fiber laser based on phase shifting optical fiber grating

A phase-shifted fiber grating and distributed Bragg technology, applied in lasers, laser parts, phonon exciters, etc., can solve difficult debugging, laser power output can not meet the needs of practical applications, can not obtain high-power single-frequency laser output and other issues, to achieve the effect of simple structure, low power consumption and low cost

Inactive Publication Date: 2009-07-15
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The structure contains bulk optical elements, which is not easy to debug, and the laser power output cannot meet the needs of practical applications
[0007] The disadvantage of the above prior art is that it is impossible to obtain high-power single-frequency laser output

Method used

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  • Distributed Bragg reflection type single frequency optical fiber laser based on phase shifting optical fiber grating
  • Distributed Bragg reflection type single frequency optical fiber laser based on phase shifting optical fiber grating
  • Distributed Bragg reflection type single frequency optical fiber laser based on phase shifting optical fiber grating

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Embodiment 1

[0041] The structure of embodiment 1 is as figure 1 As shown, the manufacturing method of the present embodiment is to select a longer high-concentration doped fiber 2 according to the actual needs of the output power of the single-frequency fiber laser of the present invention, and weld a fiber grating 1 at one end thereof, and weld a phase-shifting fiber grating at the other end 3 and fiber grating 4. The phase-shifting fiber grating 3 and the fiber grating 4 are fabricated on one optical fiber at the same time, and it must be ensured that the cavity length l of the equivalent FP cavity satisfies the value of formula 3.

Embodiment 2

[0043] The structure of embodiment 2 is as figure 2 As shown, it can be seen from the figure that this embodiment is based on a phase-shifted fiber grating distributed Bragg reflection single-frequency fiber laser, which is characterized in that a high-concentration doped fiber 2 is used as a laser gain medium, and the high-concentration doped fiber 2 One end of the fiber Bragg grating 1 is welded, and the other end is welded to form an equivalent FP cavity consisting of a phase-shifted fiber Bragg grating 3 and a fiber Bragg grating 4; the pump source 6 is connected to the λ of the wavelength division multiplexer 5 1 port, the hybrid port of the wavelength division multiplexer 5 is connected to the fiber grating 1, and the λ of the wavelength division multiplexer 5 2 The port is the laser output port 7.

[0044] The equivalent FP cavity composed of the phase-shifted fiber grating 3 and the fiber grating 4 satisfies the following relationship:

[0045] l ...

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Abstract

The present invention discloses distributed prague reflection-type single frequency optical fiber laser based on phase displacement optical fiber grating, characterized in that filtering frequency selection is realized by utilizing narrowband filter effect of reflection peak of equivalent Fabry-Perot cavity that composed by the phase displacement optical fiber grating and optical fiber grating. The whole device comprises a pumping source, a wavelength division multiplexer, optical fiber grating, phase displacement optical fiber grating, high concentration adulterate optical fiber and optical fiber grating, wherein the optical fiber grating, the phase displacement optical fiber grating, the high concentration adulterate optical fiber and the optical fiber grating constitutes the laser resonant cavity. The present invention is capable of outputting high power single frequency laser.

Description

technical field [0001] The invention relates to a high-power single-frequency fiber laser, especially a distributed Bragg reflection type high-power single-frequency fiber laser based on a phase-shifting fiber grating, which is mainly used in high-resolution laser spectrum, lidar laser seed source and high-power laser system Excellent seed sources and other fields. Background technique [0002] With the development of science and technology, high-resolution laser spectroscopy, coherent communication, optical fiber sensing, lidar and high-power laser systems have proposed high-power and single-frequency indicators for laser sources. High-power single-frequency fiber lasers have the advantages of low pumping threshold, narrow linewidth, high conversion efficiency, good beam quality, all-fiber integration, and good environmental adaptability, which can meet the needs of practical applications. [0003] Fiber lasers are developed on the basis of optical amplifier technology. Do...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067H01S3/098H01S3/1055H01S3/0941
Inventor 孟莉潘政清蔡海文方祖捷瞿荣辉
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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