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Device for improving spacial distribution of output beams output of multimode fibers

A multi-mode fiber, spatial distribution technology, applied in the field of laser applications, can solve the problems of difficult re-adjustment, difficult to ensure consistency, inconvenient installation and adjustment, etc., to improve the spatial distribution of the output beam, reduce the sensitivity, and achieve a uniform output spot. Effect

Inactive Publication Date: 2010-01-20
BWT BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these existing solutions are not simple enough, requiring relatively large devices and sufficient length of optical fibers, inconvenient installation and adjustment, and difficult to guarantee consistency during mass production
Moreover, once the environment, position, external force, temperature, etc. of the optical fiber change during use, resulting in changes in the distribution of the output beam, it is difficult to readjust

Method used

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  • Device for improving spacial distribution of output beams output of multimode fibers
  • Device for improving spacial distribution of output beams output of multimode fibers
  • Device for improving spacial distribution of output beams output of multimode fibers

Examples

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Embodiment Construction

[0015] Apply multi-point stress to a small section of optical fiber, such as figure 1 The structure shown is implemented. Two workpieces (1) with jagged surface undulations are made, the saw teeth are arranged in a staggered manner, the optical fiber (2) is clamped in the saw teeth on both sides, and pressure is applied. At this time, the optical fiber (2) will be bent under strong pressure at the contact point with each sawtooth, and stress will be generated inside it. By changing the pressure, the light output through the optical fiber (1) can achieve an ideal distribution condition, and at this time, glue or screws are used to fix the workpiece (1) and the optical fiber (2). In this example, the undulations on the workpiece (1) are jagged, and other uneven shapes can also be designed in actual use.

[0016] figure 2 A structure that can adjust the pressure of each pressure point of the optical fiber is shown. The screw (3) is screwed on the screw seat (4), the optical ...

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Abstract

The invention relates to a device for improving the spacial distribution of output beams of multimode fibers. The invention adopts the principle that single-point or multipoint or continuous distributed external stress is exerted on a short length of multimode fibers for transmitting laser to change the transmission mode distribution of light in the multimode fibers, thereby the spacial distribution of beams output form end planes of fibers can be changed. The device is especially suitable for semiconductor laser devices output by fiber coupling. After packaging is completed, the spacial distribution of output beams is improved according to specific use requirement. The device has the advantages of simple use, rapidness and good applicability.

Description

technical field [0001] The invention is applied to fiber coupling packaging of various lasers, especially semiconductor lasers, and belongs to the field of laser applications. Background technique [0002] There are many laser applications that require laser output through multimode fibers, such as semiconductor laser pumping solid-state lasers, laser marking, laser cutting, laser plate making, laser lighting, etc. Many of these applications require that the spatial distribution of the beam output from the multimode fiber must be smooth, symmetrical, or uniform, such as flat top-shaped distribution, Gaussian-like distribution, etc. However, due to its inherent characteristics, it is difficult to directly meet these requirements in practice. For example, for a high-power semiconductor laser coupled through a multimode fiber, the divergence angle of the emitted beam of the laser die in the direction of the fast axis is 30°-40°, and the divergence angle of the slow axis is 6°-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/42
Inventor 王仲明朱晓鹏陈晓华
Owner BWT BEIJING
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