Narrow-band low-noise random fiber laser Raman pump light source

A fiber laser and Raman pumping technology, which is applied to lasers, phonon exciters, laser components, etc., can solve problems such as poor time domain stability, fierce competition, and large relative intensity noise, and achieve a modeless, narrow-band, low frequency spectrum. Noise, improved system performance, output power and flexible and adjustable laser wavelength

Inactive Publication Date: 2021-01-05
SICHUAN GUANGSHENG IOT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problems of fierce competition in the output laser spectrum mode of existing lasers, large relative intensity noise, and poor time domain stability, and provide a narrow-band low-noise random fiber laser Raman pump source

Method used

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  • Narrow-band low-noise random fiber laser Raman pump light source
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  • Narrow-band low-noise random fiber laser Raman pump light source

Examples

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Embodiment 1

[0032]Such asfigure 1 As shown, in Example 1, a narrow-band low-noise random fiber laser Raman pump light source includes a ytterbium-doped random fiber laser for generating a ytterbium-doped fiber random laser as a cascaded narrow-band Raman random laser pump; The Ytterbium random fiber laser includes a pump light source 1, a pump combiner 2, a ytterbium-doped fiber 3, a single-mode fiber 4 connected in sequence, and a first narrow-band mirror connected to the signal end of the pump combiner 2, The structure is simple and compact. Using the very weak back Rayleigh scattered light in the single-mode fiber 4 as feedback, the generated Ytterbium-doped fiber random laser has no fixed resonant cavity, that is, there is no periodic interval of the frequency spectrum corresponding to the fixed resonant cavity length. Mode and high stability in the time domain, the spectrum mode-free ytterbium-doped fiber random laser is used as the pump of the Raman light source, and the random fiber lase...

Embodiment 2

[0046]This embodiment has the same inventive concept as the embodiment 1. On the basis of the embodiment 1, when the power of the pump light source 1 is reduced to 8W, a narrow-band Raman pump light output of 1280 nm can be realized.

Embodiment 3

[0048]This embodiment has the same inventive concept as the embodiment 1. On the basis of the embodiment 1, when the length of the single-mode fiber 4 is reduced to 3 km, a higher power 1210nm narrow-band Raman pump light output can be realized.

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Abstract

The invention discloses a narrow-band low-noise random fiber laser Raman pump light source and belongs to the technical field of fiber lasers. The narrow-band low-noise random fiber laser Raman pump light source comprises an ytterbium-doped random fiber laser used for generating ytterbium-doped fiber random laser as a cascade Raman random laser pump; the ytterbium-doped random fiber laser comprises a pump light source, a pump beam combiner, an ytterbium-doped fiber, a single-mode fiber and a first narrow-band type reflector which is connected with the signal end of the pump beam combiner, wherein the pump light source, the pump beam combiner, the ytterbium-doped fiber and the single-mode fiber are sequentially connected with one another. The pump light source pumps the ytterbium-doped fiber random laser generated by the ytterbium-doped random fiber laser composed of the narrow-band point type reflector, the ytterbium-doped fiber and the single-mode fiber, the ytterbium-doped fiber random laser further serves as a Raman light source pump, and random laser output is achieved. Due to the fact that frequency spectrum mode-free ytterbium-doped fiber random laser pumping is adopted, thetime domain volatility and relative intensity noise of the random fiber laser Raman pumping light source are remarkably lower than those of a traditional Raman fiber laser.

Description

Technical field[0001]The invention relates to the technical field of fiber lasers, in particular to a narrow-band low-noise random fiber laser Raman pump light source.Background technique[0002]The traditional Raman fiber laser is composed of a pump source, a resonator and a gain fiber. Its output wavelength and spectral longitudinal mode interval are determined by the resonator. It can be used as a pump source for distributed Raman amplification technology and has been widely used in optical fiber communications. And the field of optical fiber sensing. However, due to the competition of spectrum modes of Raman fiber lasers, the time-domain stability of its lasing laser output is limited. When used as a distributed Raman amplifier pump source for long-distance fiber communication and fiber sensing systems, its relative intensity noise will be affected. Transfer to signal light, resulting in system performance degradation, unable to output narrow-band, low-noise, time-domain stability...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067H01S3/105H01S3/30
CPCH01S3/06716H01S3/06733H01S3/06708H01S3/302H01S3/105H01S3/1618H01S3/06795H01S3/0915H01S3/0675H01S3/10084H01S3/094046H01S3/094065
Inventor 饶云江韩冰吴函
Owner SICHUAN GUANGSHENG IOT TECH CO LTD
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