Linear and nonlinear Faraday rotations of light polarization in a four-level active-Raman-gain medium

Published

August 28, 2013

Author(s)

Lu Deng, Chengjie Zhu, Edward W. Hagley

Abstract

We investigate linear and nonlinear Faraday effects in a room-temperature, coherently driven four-level active- Raman-gain (ARG) medium. By using the multiple-scale method, we derive two nonlinear coupled envelope equations governing the dynamics of left- and right-polarized components of a linearly polarized probe field. Under the weak probe field approximation, we demonstrate a factor of four increase of the Faraday rotation angle by the linear and nonlinear response of the ARG scheme without probe field loss. We further compare this ARG system with an M-type five-state electromagnetically induced transparency (EIT) scheme and demonstrate the superiority of the ARG scheme over the conventional EIT scheme.

Citation

Physical Review A

Volume

88

Issue

(2)

Pub Type

Journals

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DOI Link

Keywords

Faraday rotation, Raman gain medium, Electromagnetically induced transparency

Citation

Deng, L. , Zhu, C. and Hagley, E. (2013), Linear and nonlinear Faraday rotations of light polarization in a four-level active-Raman-gain medium, Physical Review A, [online], https://doi.org/10.1103/PhysRevA.88.023854 (Accessed October 9, 2025)