Fiber coupled diode laser module for laser processing by polarization multiplexing

ZHU Hong-bo; LI Yan-hua; HAO Ming-Ming; LIU Yun; QIN Li; NING Yong-qiang; WANG Li-jun

doi:10.3788/OPE.20132105.1137

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Fiber coupled diode laser module for laser processing by polarization multiplexing

更新时间：2020-08-12

- Fiber coupled diode laser module for laser processing by polarization multiplexing
- Optics and Precision Engineering Vol. 21, Issue 5, Pages: 1137-1143(2013)
- 作者机构：
  
  中国科学院长春光学精密机械与物理研究所发光学及应用重点实验室
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20132105.1137
  CLC： TN248.4
- Received：05 March 2012，
  
  Revised：09 May 2012，
  
  Published Online：24 May 2013，
  
  Published：15 May 2013
- 稿件说明：
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朱洪波李艳华郝明明刘云秦莉宁永强王立军. 基于偏振复用技术的新型半导体激光加工光纤耦合模块[J]. 光学精密工程, 2013,21(5): 1137-1143

ZHU Hong-bo LI Yan-hua HAO Ming-Ming LIU Yun QIN Li NING Yong-qiang WANG Li-jun. Fiber coupled diode laser module for laser processing by polarization multiplexing[J]. Editorial Office of Optics and Precision Engineering, 2013,21(5): 1137-1143
朱洪波李艳华郝明明刘云秦莉宁永强王立军. 基于偏振复用技术的新型半导体激光加工光纤耦合模块[J]. 光学精密工程, 2013,21(5): 1137-1143 DOI： 10.3788/OPE.20132105.1137.

ZHU Hong-bo LI Yan-hua HAO Ming-Ming LIU Yun QIN Li NING Yong-qiang WANG Li-jun. Fiber coupled diode laser module for laser processing by polarization multiplexing[J]. Editorial Office of Optics and Precision Engineering, 2013,21(5): 1137-1143 DOI： 10.3788/OPE.20132105.1137.

摘要

与半导体激光Bar条相比，单管半导体激光器具有光束质量好，寿命长等优点，但由于其输出功率小，故在激光加工等领域的应用受到限制。为提高单管半导体激光器的输出功率，提出了基于偏振复用技术对多个单管半导体激光器进行光纤耦合的方法。首先，将16只808 nm单管半导体激光器分成两个单元，通过空间合束将每个单元上的激光器发出的光合成一路；然后，利用偏振复用技术将两个单元发出的光束再次合束，通过自行设计的聚焦系统将合束后的光束耦合进光纤实现光纤输出，从而提高了半导体激光器光纤耦合模块的功率水平。实验显示，当工作电流为5.8 A时，通过芯径为200 m、数值孔径（NA）为0.2的光纤的输出功率为67 W，耦合效率达到84%。此模块在功率和光束质量方面满足激光塑料焊接等应用的要求。

Abstract

Single emitter diode laser has better beam quality and longer lifetime as compared with a diode laser bar. However

its application to the material processing is limited by its lower output powers. To improve the output power of the single emitter diode laser

this paper proposed an optical fiber coupling method for single emitter diode lasers based on the polarization multiplexing. Firstly

16 single emitters were divided into two laser groups

and the laser beam from the two groups was combined into one by spacial multiplexing technology. Then the beam was combined by polarization multiplexing again. Finally

a focusing system developed by ourselves was used to couple the combined beam into an optical fiber to improve the output power of the optical fiber coupling module. Experimental results show that the laser output of the module can reach 67 W from a fiber with a fiber core of 200 m and a Numerical Aperture (NA) of 0.2 when the working current is 5.8 A. Moreover

the coupling efficiency of the module has reached 84%. This high power LD module can meet the requirements of plastic processing in power and beam quality.

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references

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Related Institution

Troop 96658, the Chinese People's Liberation Army

College of Applied Sciences, Beijing University of Technology

Institute of Laser Engineering, Beijing University of Technology

State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences2. Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences

Suzhou Institute of Biomedical Engineering and Technology， Chinese Academy of Sciences

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