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High efficiency tandem-pumped fiber amplifier

Xiao Hu Leng Jin-Yong Wu Wu-Ming Wang Xiao-Lin Ma Yan-Xing Zhou Pu Xu Xiao-Jun Zhao Guo-Min

High efficiency tandem-pumped fiber amplifier

Xiao Hu, Leng Jin-Yong, Wu Wu-Ming, Wang Xiao-Lin, Ma Yan-Xing, Zhou Pu, Xu Xiao-Jun, Zhao Guo-Min
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  • Abstract views:  2042
  • PDF Downloads:  657
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Publishing process
  • Received Date:  04 January 2011
  • Accepted Date:  09 August 2011
  • Published Online:  05 June 2011

High efficiency tandem-pumped fiber amplifier

  • 1. College of Opto-electric Science and Engineering, National University of Defense Technology, Changsha 410073, China

Abstract: A 1020 nm fiber laser is designed based on fiber Bragg grating and then its output power is boosted to 590 mW through a two-stage amplifier. A tandem pumping fiber amplifier is constructed with the 1020 nm laser used as a pump source. The output power and the efficiency of the amplifier are measured with different lengths of gain fiber. A 385 mW maximum output power with an 81% slope-efficiency is achieved when the gain fiber is 8.5 m. The output power and the efficiency of a traditional amplifier in which 976 nm diode laser is used as a pump source are also measured. The experimental results indicate that tandem pumping fiber amplifier can achieve a higher efficiency than traditional fiber amplifier.

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