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Chin. Phys. B, 2013, Vol. 22(11): 114208    DOI: 10.1088/1674-1056/22/11/114208
ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS Prev   Next  

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)
Center for Photonics and Electronics, State Key Laboratory of Tribology, Department of Precision Instruments and Mechanology, Tsinghua University, Beijing 100084, China
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.
Keywords:  design of specific laser system      optical propagation transmission and absorption      physical optics  
Received:  07 March 2013      Revised:  11 April 2013      Accepted manuscript online: 
PACS:  42.55.Wd (Fiber lasers)  
  42.81.Qb (Fiber waveguides, couplers, and arrays)  
Corresponding Authors:  Yan Ping     E-mail:  pyan@mail.tsinghua.edu.cn

Cite this article: 

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) Theoretical study of power amplification in tapered fiber with multi-seed parallel injection 2013 Chin. Phys. B 22 114208

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