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11 February 2005 A novel method for fast Raman fiber amplifier optimal configuration
He Wen, Xin Yang, Wanyi Gu
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Proceedings Volume 5625, Optical Transmission, Switching, and Subsystems II; (2005) https://doi.org/10.1117/12.569465
Event: Asia-Pacific Optical Communications, 2004, Beijing, China
Abstract
A novel method for fast pump configuration of flat-gain Raman fiber amplifier is provided in this paper. With neglect the weak difference of Raman gain profile dependent on pump wavelength, the total gain of amplifier in dB unit can be viewed as output of a special linear time invariant (LTI) system. The LTI system characters its unit impulse response as the Raman gain coefficient spectrum, its input as pump configuration spectrum, and its output as the amplifier gain. Given the target amplifier gain, the continuous pump configuration spectrum can be easily derived by using fast Fourier transform (FFT). Then with clustering approximating of the continuous pump configuration spectrum, the pump configuration is obtained. The clustering approximation and its impact are also discussed. The numerical results reveal that for 13THz bandwidth Raman fiber amplifier, the maximum gain-inflatness of LTI system method is only 0.3dB worse than that of conventional Generic algorithm (GA) method, but the computation time is at least one magnitude saved.
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He Wen, Xin Yang, and Wanyi Gu "A novel method for fast Raman fiber amplifier optimal configuration", Proc. SPIE 5625, Optical Transmission, Switching, and Subsystems II, (11 February 2005); https://doi.org/10.1117/12.569465
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KEYWORDS
Raman spectroscopy
Fiber amplifiers
Optical amplifiers
Systems modeling
Fourier transforms
Wave propagation
Signal attenuation
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