A Novel Method for Multi-Pumped Fibre Raman Amplifier Gain Adjustment
HAN Qun, NING Ji-Ping, CHEN Zhi-Qiang, SHANG Lian-Ju
Laboratory for Photoelectronic Information Science and Technology (Ministry of Education), Tianjin University, Tianjin 300072
College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072
A Novel Method for Multi-Pumped Fibre Raman Amplifier Gain Adjustment
HAN Qun;NING Ji-Ping;CHEN Zhi-Qiang;SHANG Lian-Ju
Laboratory for Photoelectronic Information Science and Technology (Ministry of Education), Tianjin University, Tianjin 300072
College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072
Abstract： A novel method for gain adjustment of multi-pumped fibre Raman amplifiers is proposed and numerically demonstrated. The method uses the areas under the curves of the pump power evolution along the gain fibre and the Newton--Raphson method to find an appropriate power combination of the pumps to realize the desired gain profile. Compared with the previously proposed methods, our method has two advantages: first, it can maintain the gain profile while changing the gain magnitude to the desired value; second, it is independent of the actual pumping scheme of the amplifier, i.e. it can be used for fibre Raman amplifiers with all kinds of pumping schemes including co-, counter-, or bi-directional pumping. Numerical simulations are provided to verify the proposed method and to demonstrate its effectiveness.
HAN Qun;NING Ji-Ping;CHEN Zhi-Qiang;SHANG Lian-Ju. A Novel Method for Multi-Pumped Fibre Raman Amplifier Gain Adjustment[J]. 中国物理快报, 2005, 22(5): 1148-1151.
HAN Qun, NING Ji-Ping, CHEN Zhi-Qiang, SHANG Lian-Ju. A Novel Method for Multi-Pumped Fibre Raman Amplifier Gain Adjustment. Chin. Phys. Lett., 2005, 22(5): 1148-1151.
2005, Vol. 22 
