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

doi:10.1088/1674-1056/22/11/114208

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

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

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