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Device for real-time power feedback of high-power optical fiber laser

A fiber laser, real-time feedback technology, used in laser cooling devices, laser monitoring devices, lasers, etc., can solve problems such as thermal conductivity, poor adjustability, complex structure, etc., to achieve fast response speed, real-time feedback, and stable output. Effect

Inactive Publication Date: 2017-11-21
NANJING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, some existing methods for measuring cladding light intensity have disadvantages such as complex structure, poor thermal conductivity, and poor adjustability, which need further improvement

Method used

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  • Device for real-time power feedback of high-power optical fiber laser
  • Device for real-time power feedback of high-power optical fiber laser
  • Device for real-time power feedback of high-power optical fiber laser

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Experimental program
Comparison scheme
Effect test

Embodiment

[0031] The laser uses 20 / 400 double-clad fiber as the output fiber, and the welding point between the stripper pigtail and the QBH is selected as the installation place of the device. The leaked cladding light will not be too strong, and will not cause serious heating and photoelectric detection. For the saturation of the device, corrode the inner cladding with hydrofluoric acid on the side of the fusion point, the corrosion length is about 2-3mm, cover the fusion point and the corrosion with a dehydroxylated glass tube with a length of about 2cm, and then use glue on both sides of the glass tube and fiber optics. Design a metal base, the external dimensions of the entire base can be designed to be 10cm×1.6cm, two fixing screws are fixed to the water cooling plate, there are fiber grooves, the width can be designed to be 2mm, four metal fixture installation positions are designed, kilowatt-level high-power full After the fiber laser passes through the cladding light stripper, ...

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Abstract

The invention provides a device for real-time power feedback of a high-power optical fiber laser. The device comprises a metal base, a double cladding optical fiber connected with a to-be-detected laser, a glass tube, a metal clamp and a photoelectric detector, wherein the metal base is provided with an optical fiber groove; the double cladding optical fiber is provided with a fusion welding point; an inner cladding on one side of the fusion welding point is subjected to corrosion and polishing to form abrasion parts; the glass tube is sleeved at the fusion welding point and the abrasion parts; the glass tube and the double cladding optical fiber are arranged in the optical fiber groove; the metal clamp is arranged on the metal base; and the photoelectric detector is arranged on the metal clamp, and used for detecting leakage light of the abrasion parts.

Description

technical field [0001] The invention relates to a fiber laser technology, in particular to a device for real-time power feedback of a high-power fiber laser. Background technique [0002] High-power fiber lasers are fiber lasers doped with rare earth elements in fiber materials, and the continuous laser power reaches hundreds of watts, kilowatts or even 10,000 watts. High-power fiber lasers have become another research hotspot in the field of optical communications, which can provide high-gain output The laser conforms to the low-loss window of optical communication, and it is economical and affordable to use a semiconductor laser as a pump source. At present, most high-power fiber lasers work based on the main oscillation power amplification (MOPA), usually with a multi-stage structure. The multi-level structure brings down the stability of the system. Under high power operation, effective power monitoring methods are needed to ensure the stable and safe operation of the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/10H01S3/067H01S3/04H01S3/00
CPCH01S3/10H01S3/0014H01S3/0407H01S3/06708
Inventor 韩志刚任大良沈华刘明朱日宏方泽远王争於安琪单崇铭
Owner NANJING UNIV OF SCI & TECH
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