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Laser Physics

Coherent control of polarization state rotation via Doppler broadening and Kerr nonlinearity in a spinning fast light medium

Habibur Rahman, Hizbullah, M S Abdul Jabar, Anwar Ali Khan, Iftikhar Ahmad, Bakht Amin Bacha

Published Oct 2, 2014• 30 citations
Publisher

Abstract

Coherent control of polarization state rotation via Doppler broadening and Kerr nonlinearity in a spinning fast light medium, Rahman, Habibur, Hizbullah, Jabar, M S Abdul, Khan, Anwar Ali, Ahmad, Iftikhar, Bacha, Bakht Amin
DOI
10.1088/1054-660x/24/11/115404

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We study optical bistability (OB) in a controllable giant self-Kerr nonlinear atomic gaseous medium placed in a unidirectional ring cavity. The medium is coherently excited by strong controlling field and a weak probe laser field under electromagnetically induced transparency (EIT) and Doppler broadening. In a weak field limit of the probe light, an analytic OB equation for the probe light field is derived as an analytic function of parameters of the controlling field and temperature of the medium. It is shown that OB characters can be manipulated with the parameters due to the controllable properties of the self-Kerr nonlinearity. Furthermore, enhancement of the Kerr nonlinearity reduces the switching intensity threshold and width of the OB.