中国物理B ›› 2013, Vol. 22 ›› Issue (11): 114208-114208.doi: 10.1088/1674-1056/22/11/114208

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Theoretical study of power amplification in tapered fiber with multi-seed parallel injection

肖起榕, 任海翠, 李丹, 巩马理, 闫平   

  1. Center for Photonics and Electronics, State Key Laboratory of Tribology, Department of Precision Instruments and Mechanology, Tsinghua University, Beijing 100084, China
  • 收稿日期:2013-03-07 修回日期:2013-04-11 出版日期:2013-09-28 发布日期:2013-09-28

Theoretical study of power amplification in tapered fiber with multi-seed parallel injection

Xiao Qi-Rong (肖起榕), Ren Hai-Cui (任海翠), Li Dan (李丹), Gong Ma-Li (巩马理), Yan Ping (闫平)   

  1. Center for Photonics and Electronics, State Key Laboratory of Tribology, Department of Precision Instruments and Mechanology, Tsinghua University, Beijing 100084, China
  • Received:2013-03-07 Revised:2013-04-11 Online:2013-09-28 Published:2013-09-28
  • Contact: Yan Ping E-mail:pyan@mail.tsinghua.edu.cn

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摘要： We proposed the concept of parallel injection power amplification. A tapered fiber amplifier with multi-seed sources by the way of parallel injection was studied. The lower-order modes are excited and more than 90% of the input signal power remains in the fiber core if optimal injection and taper design are set. The power in the doped-core is amplified with high optical-optical efficiency. When light is propagating along the fiber, the higher-order modes are filtered which results in the high output beam quality. Incoherent combination of multi-seed lights launched through the wide end gives rise to the output power of several kW.

关键词: design of specific laser system, optical propagation transmission and absorption, physical optics

Abstract: We proposed the concept of parallel injection power amplification. A tapered fiber amplifier with multi-seed sources by the way of parallel injection was studied. The lower-order modes are excited and more than 90% of the input signal power remains in the fiber core if optimal injection and taper design are set. The power in the doped-core is amplified with high optical-optical efficiency. When light is propagating along the fiber, the higher-order modes are filtered which results in the high output beam quality. Incoherent combination of multi-seed lights launched through the wide end gives rise to the output power of several kW.

Key words: design of specific laser system, optical propagation transmission and absorption, physical optics

中图分类号:  (Fiber lasers)

  • 42.55.Wd
42.81.Qb (Fiber waveguides, couplers, and arrays)