Pulse amplification characteristics of multimode fiber amplifier |
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| Authors: | Yuqing Fu Jianguo Chen |
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| Affiliation: | 1. College of Engineering, Huaqiao University, Quanzhou 362021, China;2. Department of Optoelectronics, Sichuan University, Chengdu 610064, China |
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| Abstract: | Under small signal situation, the analytical expression for describing the output signal emitted from an Yb3+-doped fiber amplifier with a Gaussian input pulse signal is deduced, by full considering both fiber guided modes’ propagation constant and filling factor, which depend on the signal frequency. Pumped by continue wave (CW) source, the analytical expressions of the small signal gain and each guided mode's output power are obtained. Based on these analytical expressions, the various intensity distributions of output pulses amplified by the fiber amplifier with different Gaussian input pulse widths are analyzed. |
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| Keywords: | Filling factor Pulse profile distortion Multimode amplifier Small signal |
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