Roy, Samudra and Bhadra, Shyamal Kumar and Agrawal, Govind P (2009) Raman amplification of optical pulses in silicon waveguides: effects of finite gain bandwidth, pulse width, and chirp. Journal of the Optical Society of America B-Opticcal Physics, 26 (1). pp. 17-25. ISSN 0740-3224

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Abstract

We present a theoretical model capable of describing the evolution of pulse parameters when stimulated Raman scattering under continuous-wave pumping is employed for amplifying them inside a silicon waveguide. In our approach, pulse evolution is described analytically by a set of coupled equations derived using a variational formalism. Optical losses resulting from linear absorption or scattering, two-photon absorption, and free-carrier absorption are included by introducing the Rayleigh dissipation function. The influence of gain dispersion originated from a relatively narrow Raman-gain bandwidth is also considered. The role of initial pulse width and chirp is studied extensively because of its practical applications. To ensure the validity of the variational technique, all analytical results are compared with the numerical data obtained with the split-step Fourier algorithm. (c) 2008 Optical Society of America

Item Type:	Article
Subjects:	Physical Properties
Divisions:	Fuel Cell and Battery
Depositing User:	Bidhan Chaudhuri
Date Deposited:	01 Mar 2012 11:51
Last Modified:	01 Mar 2012 11:51
URI:	http://cgcri.csircentral.net/id/eprint/1090

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