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Distributed fiber laser monitoring system and monitoring method

A distributed optical fiber and fiber laser technology, applied in instruments, measuring devices, scientific instruments, etc., can solve the problems of difficulty in finding faults, difficult to locate background faults, etc., and achieve the effect of solving missed detection and detection and reducing costs.

Inactive Publication Date: 2020-12-04
JIANGSU HENGTONG OPTICAL FIBER TECH +1
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Problems solved by technology

At present, the number of sensors for a 1kW fiber laser module is 5-10, while the number of sensors for a 10,000-watt high-power multimode fiber laser system is as many as hundreds. Failures that occur are difficult to detect

Method used

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  • Distributed fiber laser monitoring system and monitoring method
  • Distributed fiber laser monitoring system and monitoring method
  • Distributed fiber laser monitoring system and monitoring method

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Embodiment Construction

[0025] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. Note that the aspects described below in conjunction with the drawings and specific embodiments are only exemplary, and should not be construed as limiting the protection scope of the present invention.

[0026] The embodiment of the invention discloses a fiber laser monitoring system, which includes a fiber laser and a sensor. Wherein, the sensor is a sensing optical fiber or a sensing optical cable, and the sensor uses Raman (Raman) scattering technology to perform continuous distributed real-time monitoring of the temperature parameters in the fiber laser.

[0027] Among them, the principle of using Raman (Raman) scattering effect for temperature measurement is: after the output laser light of high-power narrow-pulse laser pulsed semiconductor laser is incident on the sensing fiber, the laser interacts with the molecules in the fiber core to...

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Abstract

The invention discloses a distributed optical fiber laser monitoring system and method. The monitoring system comprises an optical fiber laser and a sensor, the sensor is a sensing optical fiber or asensing optical cable, and the sensor performs continuous distributed real-time monitoring on temperature parameters in the optical fiber laser by using a Raman scattering technology. According to theinvention, the sensing optical fiber / optical cable of the Raman scattering technology is used as a sensor, so that the real-time temperature monitoring of the whole optical fiber laser can be realized by only one optical fiber, the information of any point on the sensing optical fiber can be accurately obtained, and the problem of missing detection and missing detection of a point sensor is solved. In addition, the cost of the sensor is greatly reduced by adopting the communication optical fiber as the sensor.

Description

technical field [0001] The invention relates to the safety monitoring and protection technology of a fiber laser system, in particular to a distributed fiber laser monitoring system and a monitoring method. Background technique [0002] High-power fiber lasers are mainstream tools for applications such as sheet metal cutting, metal welding, and additive manufacturing, and are important supporting units for modern industry 4.0 and intelligent manufacturing. However, the high-power fiber laser source itself is a double-edged sword, which can realize high-energy-density metal block processing, but once it fails, such as the temperature rise of optical fiber leakage, heat accumulation caused by nonlinear effects, heat generation caused by melting point loss, extrusion gain and In the case of energy-transmitting optical fibers, etc., it may seriously self-destruct, or even burn the entire laser system. The development of high-power fiber laser technology has also been struggling...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K11/32
CPCG01K11/32
Inventor 孙伟严勇虎彭宇相李艳莉姚之圃陈伟朱永刚宋君
Owner JIANGSU HENGTONG OPTICAL FIBER TECH
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