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High Power Metal-Clad Mode Absorbers

An absorber and cladding technology, applied in the field of high-power fiber laser systems, can solve problems such as CMA damage, low thermal conductivity, and high temperature

Active Publication Date: 2017-07-07
IPG PHOTONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] An additional limitation is associated with the relatively low thermal conductivity of the polymer compound, leading to its high temperature
A temperature of 110 °C is generally considered critical and higher temperatures lead to destruction of the CMA

Method used

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Examples

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Embodiment Construction

[0017] Reference will now be made in detail to the disclosed energy absorbers, high power fiber laser systems incorporating the absorbers, and methods of making the absorbers. Where possible, the same or similar reference numerals are used in the drawings and descriptions to denote the same or similar components or steps. The drawings are in simplified form and are not drawn to exact scale. Directional terms may be used with respect to the plane of the drawing for convenience and clarity only, but should not be construed as limiting the scope. Unless otherwise defined, all words and phrases used in the specification and claims have their ordinary and customary meanings as understood by those of ordinary skill in the fiber laser art.

[0018] figure 1 Illustrated is a schematic diagram of a typical gain block 10 operable, alone or in combination with similarly configured gain blocks, to emit a substantially SM beam output up to the kW range. The output beam is then transmitt...

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Abstract

A cladding absorber unit is disposed on a passive fiber of a high power fiber laser system and operates to trap and remove higher order modes propagating along the cladding of the passive fiber. Mode absorbers have a composite of one or more liquid metals and alloys thereof placed in openings formed in the jacket of a passive optical fiber. The composition is configured to remove MM light from the cladding with a predetermined optical power that heats the composition at a temperature below a threshold temperature for damaging the absorber.

Description

technical field [0001] The present disclosure relates to high power fiber laser systems. In particular, the present disclosure relates to cladding mode strippers / absorbers that operate to trap and remove unwanted cladding-guided light in passive optical fibers. Background technique [0002] A high power single-mode fiber laser system ("HPSMFLS") is typically configured with one or more amplification cascades, each of which includes a side-pumped or end-pumped active Source double-clad fiber. The pump light propagating along the cladding of the optical waveguide is usually not fully absorbed along the length of the active fiber and is eventually coupled into the cladding of the SM passive fiber. In addition, power dissipation at the joint is also responsible for the multimode light propagating along the waveguide cladding beneath the polymer protective sheath. In addition, backreflected light from the surface to be laser treated can also be coupled into the cladding. Even...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/098G02B6/02
CPCG02B6/03694G02B6/14H01S3/0405H01S3/042H01S3/067H01S3/06708H01S3/06733H01S3/08045H01S3/094007
Inventor 瓦伦丁·盖庞特瑟夫瓦伦丁·弗明米哈伊尔·阿布拉莫夫安东·费林
Owner IPG PHOTONICS CORP