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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 |
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| Cite this article: |
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HAN Qun, NING Ji-Ping, CHEN Zhi-Qiang et al 2005 Chin. Phys. Lett. 22 1148-1151 |
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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.
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42.60.Da
02.60.Cb
42.65.Dr
78.20.Bh
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Published: 01 May 2005
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| PACS: |
42.60.Da
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(Resonators, cavities, amplifiers, arrays, and rings)
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02.60.Cb
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(Numerical simulation; solution of equations)
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42.65.Dr
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(Stimulated Raman scattering; CARS)
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78.20.Bh
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(Theory, models, and numerical simulation)
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