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A kind of Raman fiber laser

A Raman fiber and Raman laser technology, applied in the field of fiber optics and lasers, can solve problems such as low conversion efficiency, poor beam quality, and difficulty in obtaining high power, and achieve the effects of reducing loss, improving conversion efficiency, and improving utilization efficiency

Active Publication Date: 2021-08-06
LASER RES INST OF SHANDONG ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional Nd:YAG solution for generating 1318.8nm lasers has small gain, low conversion efficiency, difficulty in obtaining high power, and a relatively large system
Although the semiconductor laser can greatly improve the light-to-light conversion efficiency and obtain a compact laser system, its beam quality is poor

Method used

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  • A kind of Raman fiber laser
  • A kind of Raman fiber laser
  • A kind of Raman fiber laser

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Embodiment Construction

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.

[0020] The invention provides a Raman fiber laser, such as figure 1 As shown, the laser has a simple structure and high conversion efficiency.

[0021] Such as figure 1 The Raman fiber laser shown includes a highly reflective fiber grating 1 , a Raman laser seed source 2 , a fiber laser pump source 3 and a Raman laser amplifier 4 connected in sequence.

[0022] Such as figure 2 As shown, the Raman laser seed source 2 includes a reflective-end cascaded grating string 21 , a Raman gain fiber 22 and an output-end cascaded grating string 23 connected in sequence, and the reflective-end cascaded grating string 21 is connected to the high-reflection fiber grating 1 .

[0023] Such as image 3 As shown, the fiber laser pump source 3 includes a semiconductor pump laser 31, a fibe...

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Abstract

The invention discloses a Raman fiber laser, which comprises sequentially connected high-reflection fiber gratings, a Raman laser seed source, a fiber laser pump source and a Raman laser amplifier, and the Raman laser seed source includes sequentially connected reflection ends The cascaded grating string, the Raman gain fiber and the cascaded grating string at the output end, the cascaded grating string at the reflection end is connected to the high-reflection fiber grating, and the fiber laser pump source includes a semiconductor pump laser connected in sequence, a fiber side A beam combiner, a reverse output grating, an ytterbium-doped fiber, and a forward output grating, the semiconductor pump laser is connected in series with the cascaded grating at the output end, and the forward output grating is connected to a Raman laser amplifier, disclosed in the present invention Raman fiber laser has the advantages of simple structure, high pump laser utilization efficiency, and high conversion efficiency of Raman fiber laser.

Description

technical field [0001] The invention relates to the field of optical fiber and laser technology, in particular to a Raman fiber laser with high conversion efficiency and high power. Background technique [0002] In recent years, fiber lasers have been developed rapidly, including power, beam quality, and all-fiber structures. This enables the rapid application and development of fiber lasers in the fields of industry, national defense and scientific research. [0003] However, limited by the intrinsic properties of the fiber material, the substantial increase in fiber power only occurs in a specific wavelength window. For example, the single-mode output power of ytterbium-doped fiber lasers at 1 micron wavelength has grown from 10kW in 2009 to 100kW now, while the power of other wavelengths has not increased significantly. This severely limits the development of fiber lasers in other wavelength applications. For example, in the resection of lung metastases, Dr. Rolle and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/067H01S3/30H01S3/094
CPCH01S3/0675H01S3/094042H01S3/302
Inventor 齐亮王勇赵冉冉
Owner LASER RES INST OF SHANDONG ACAD OF SCI
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