Influences of finite gain bandwidth on pulse propagating in parabolic fiber amplifiers with distributed gain profiles

doi:10.1088/1674-1056/21/9/094217

Abstract The evolutions of the pulses propagating in decreasing and increasing gain distributed fiber amplifiers with finite gain bandwidths are investigated by simulating with the nonlinear Schrödinger equation. The results show that the parabolic pulse propagations in both the decreasing and the increasing gain amplifiers are restricted by the finite gain bandwidth. For a given input pulse, by choosing small initial gain coefficient and gain variation rate, the whole gain for the pulse amplification limited by the gain bandwidth may be higher, which is helpful to the enhancement of the output linearly chirped pulse energy. Compared to the decreasing gain distributed fiber amplifier, the increasing gain distributed amplifier may be more conducive to suppress the pulse spectral broadening and increase the critical amplifier length for achieving a larger output linearly chirped pulse energy.

Keywords: finite gain bandwidth parabolic pulse linearly chirped pulse energy

Received: 13 January 2012
Revised: 25 February 2012
Accepted manuscript online:

PACS:	42.65.Re	(Ultrafast processes; optical pulse generation and pulse compression)
	42.65.-k	(Nonlinear optics)

Fund: Project supported by the National High Technology Research and Development Program of China (Grant No. 2011AA030203) and the National Basic Research Program of China (Grant No. 2007CB936603).

Corresponding Authors: Mao Qing-He
E-mail: mqinghe@aiofm.ac.cn

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Zhao Jia-Sheng (赵佳生), Li Pan (李磐), Chen Xiao-Dong (陈晓东), Feng Su-Juan (冯素娟), Mao Qing-He (毛庆和) Influences of finite gain bandwidth on pulse propagating in parabolic fiber amplifiers with distributed gain profiles 2012 Chin. Phys. B 21 094217

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Influences of finite gain bandwidth on pulse propagating in parabolic fiber amplifiers with distributed gain profiles

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