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Thermal expanding chip radius microlens optical fibre for coupled big-power semiconductor laser

A micro-lens and semiconductor technology, applied in semiconductor lasers, lasers, laser parts, etc., can solve the problems of difficult assembly and calibration, inability to improve coupling brightness, and reduce coupling tolerance, etc., to achieve compact structure, simple processing, Improve the effect of packaging

Inactive Publication Date: 2005-02-23
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for general micro-lens fibers, the core diameter of the fiber must match the laser emitting area, which cannot improve the coupling brightness
In addition, due to the use of micro-lenses, the coupling tolerance is greatly reduced
The difficulty of assembly and calibration is relatively large, so the cost is relatively high

Method used

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  • Thermal expanding chip radius microlens optical fibre for coupled big-power semiconductor laser
  • Thermal expanding chip radius microlens optical fibre for coupled big-power semiconductor laser
  • Thermal expanding chip radius microlens optical fibre for coupled big-power semiconductor laser

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Embodiment Construction

[0014] The thermally expanded core microlens fiber used for coupling high-power semiconductor lasers has a thermally expanded core 204 on the end of the multimode fiber 101, and the thermally expanded core has wedge-shaped fiber end faces 102, 306, and arc surfaces and wedge-shaped fiber end faces. 102 and 306 are tangential cylindrical fiber optic microlenses 103 . The core diameter after thermal expansion is 1.02 to 2 times the core diameter before expansion. The length of the thermally expanded core diameter portion is 0.2-20mm. The wedge-shaped fiber end face 102 has a symmetrical wedge angle with respect to the fiber sagittal plane, and the angle between the up and down inclined end faces 102, 306 is 10-160°. The cylindrical microlens 103 is tangent to the end faces 102 and 306 of the wedge-shaped optical fiber, and its cylindrical surface is perpendicular to the meridian plane, and the radius of the cylindrical surface is smaller than the core radius of the multimode op...

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Abstract

A microlens optical fibre is featured as heat-expanding core diameter at head end of multimode optical fibre so cylinder shaped optical fibre microlens having wedge fibre end face and arc face in tangent to wedge fibre end face is formed at head end of heat expanded core diameter portion. It has high coupling efficiency and high coupling tolerance for being used to prepare microlens fibre for big power semiconductor coupling laser.

Description

technical field [0001] The invention relates to a heat-expanding core-diameter micro-lens fiber for coupling high-power semiconductor lasers. It is especially suitable for pumping sources of solid-state lasers, pumping sources of fiber lasers, pumping sources of fiber amplifiers, and an important part of the key technology fiber coupling in laser light sources for industrial processing: for coupling high-power (1-10 watts) wide Thermally expanded core diameter microlens multimode fiber for semiconductor lasers and laser arrays on the light emitting surface (emission area size 50-500μm×1μm). Background technique [0002] High-brightness, high-power fiber-coupled semiconductor lasers can be widely used in the pumping of solid-state lasers, industrial laser processing and other fields: through efficient coupling, it can provide low numerical aperture, high output power laser output; and, through the optical fiber Coupling can effectively expand the application occasions of sem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/24G02B6/42H01S5/00
Inventor 张全沈诗哲
Owner ZHEJIANG UNIV