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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2004, Vol. 5 Issue (9): 1130-1134    DOI: 10.1631/jzus.2004.1130
Materials Physics     
A novel 3-stage structure for a low-noise, high-gain and gain-flattened L-band erbium doped fiber amplifier
QIANG Ze-xuan, HE Sai-ling, ZHANG Xu-liang, SHEN Lin-fang
Center for Optical and Electromagnetic Research, State Key Laboratory of Modern Optical Instrumentation, Joint Laboratory of Optical Communications, Zhejiang University, Hangzhou 310027, China
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Abstract  The configuration of the novel three-stage L-band erbium-doped fiber amplifier with very large and flat gain and very low noise figure presented in this paper uses the forward ASE (amplified spontaneous emission) from the first section of the EDF (erbium-doped fiber) and the backward ASE from the third section of the EDF (both serve as the secondary pump sources of energy) to pump the second EDF. To improve the pump efficiency, the power of the pump is split into two parts (with a ratio of e.g. 2:7). The characteristics of this L-band EDFA are studied on the basis of the Giles Model with ASE.

Key words： Erbium doped fiber amplifier      Three-stage      Pump      L-band      Fiber optical communication     
Received: 18 March 2003     
CLC:  TN929.11  
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HE Sai-ling
QIANG Ze-xuan
ZHANG Xu-liang
SHEN Lin-fang
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QIANG Ze-xuan, HE Sai-ling, ZHANG Xu-liang, SHEN Lin-fang. A novel 3-stage structure for a low-noise, high-gain and gain-flattened L-band erbium doped fiber amplifier. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2004, 5(9): 1130-1134.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.2004.1130     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2004/V5/I9/1130

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