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Laser power sensor

A technology of sensor units and fiber lasers, applied in the field of laser systems, can solve problems such as difficult collection, unreliability, and difficult detection processes

Active Publication Date: 2017-02-15
IPG PHOTONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Scattered light lacks clear directionality and is therefore difficult to collect, making the detection process rather difficult and unreliable

Method used

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Embodiment Construction

[0024] Reference will now be made in detail to preferred embodiments of the present invention, which disclose structures configured to provide focusing of scattered Rayleigh light in sufficient quantities for repeatable and reliable detection. Where possible, the same or similar reference numerals are used in the drawings and the description to denote the same or similar components or steps. The drawings are in simplified form and are not drawn to exact scale. Directional (up / down, etc.) or motion (forward / backward, etc.) terms may be used with respect to the figures for convenience and clarity only. These and similar directional terms should not be construed as limiting the scope of the invention in any way.

[0025] refer to Figures 1A-1E , the laser power sensor unit 10 includes a housing 12 which may have a variety of configurations, but as shown has a substantially rectangular body 14 . One of the relatively larger area faces 16 of the body 14 has a groove or channel ...

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Abstract

A sensor unit for detecting Rayleigh scattering of laser light, guided in a fiber along a light path, is configured with a holder. The holder has a U- shaped recess centered along an axis which extends transversely to the light path. The curved bottom of the recess has a matte reflective surface and is configured with such a radius of curvature that Rayleigh scattered light indicated on the bottom is collected in a focal plane of a light input window of a meter coaxial with the recess. The reflected amount of the Rayleigh scattering on the light input window is sufficient to provide a measurement data which deviates from a reference value at no more than about ±3%.

Description

technical field [0001] The present invention relates to laser systems, and more particularly to fiber laser systems configured with a power sensor unit capable of detecting Rayleigh scattering of laser light propagating along an optical fiber in an amount sufficient to reliably measure laser output power. Background technique [0002] The most basic way to check a laser's performance is to measure its power or energy output. Laser output directly affects the laser's ability to perform the process at hand. Measuring and monitoring this parameter is often critical from the time the laser is first manufactured, through system integration, until the end user will use the laser system in remote applications such as medical, scientific, biomedical, industrial and military applications. is very important. Just as there are many different types of lasers with widely different specifications, there are different measurement techniques that are suitable for specific laser types and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J1/02
CPCG01J1/0411G01J1/0422G01J1/0425G01J1/4257
Inventor 瓦伦丁·弗明安德雷·阿布拉莫夫安德烈·马什金
Owner IPG PHOTONICS CORP
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