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All-fiber stimulated Raman scattering light stripper

A technology of stimulated Raman scattering and light stripping, which is applied to fiber amplifiers and can solve problems such as inability to filter

Inactive Publication Date: 2014-10-22
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

For conventional uniform Bragg fiber gratings, there is only mode coupling between the forward-transmitted core mode and the backward-transmitted core guided mode, which cannot play the role of filtering

Method used

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  • All-fiber stimulated Raman scattering light stripper
  • All-fiber stimulated Raman scattering light stripper

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with the embodiments and accompanying drawings, but the protection scope of the present invention should not be limited thereby.

[0018] see figure 1 , figure 1 It is a structural schematic diagram of the all-fiber stimulated Raman scattering light stripper of the present invention. It can be seen from the figure that the all-fiber Stimulated Raman scattering light stripper of the present invention has a structure comprising a blazed fiber grating or a long-period fiber grating 1, an optical glue 3 and a heat dissipation metal block 4, and the heat dissipation metal block 4 consists of an upper block 41 and a lower block 42, the middle of the lower block 42 is provided with a straight-through groove 5 for placing optical fibers, the coating layer of the blazed fiber grating or long period fiber grating 1 gate area part 2 is removed, and placed in the Fill and cure the through groove 5 with an optica...

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Abstract

Disclosed is an all-fiber stimulated Raman scattering light stripper. The all-fiber stimulated Raman scattering light stripper comprises a blazed fiber grating or a long-period fiber grating, an optical adhesive and a cooling metal block. A coating of a grating area of the blazed fiber grating or a long-period fiber grating is removed to be placed in a metal block lower block with a straight groove, the integral straight groove is filled with the optical adhesive and the solidification is performed, and a metal block upper block covers the straight groove to achieve the encapsulation. According to the all-fiber stimulated Raman scattering light stripper, the structure is simple, the sustainable laser and stimulated Raman scattering light is high in power, the multistage stimulated Raman scattering light can be stripped, and accordingly the all-fiber stimulated Raman scattering light stripper can be applied to a high-power fiber laser and a high-power fiber amplifier.

Description

technical field [0001] The invention relates to a fiber laser, a fiber amplifier, and the stimulated Raman scattering effect in an optical fiber, and particularly designs an all-fiber stimulated Raman scattering light stripper. Background technique [0002] In high-power fiber lasers and fiber amplifiers, when the optical power density in the cavity reaches the threshold of stimulated Raman scattered light, the forward first-order Raman Stokes (Stokes) light will be excited first, if the first-order Stokes The light intensity is strong enough. Due to the cascaded Raman effect, Raman Stokes light of the second or even higher order will be generated. This frequency conversion will not only lead to a decrease in laser output power, but also limit the final output laser power of the laser or amplifier. It will also cause spectral broadening of the output laser, which will affect the subsequent application of high-power fiber lasers (eg, coherent combination of high-power fiber l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/042H01S3/067
CPCH01S2301/03H01S3/0675
Inventor 何兵胡曼周军赵纯陈晓龙刘恺
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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