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Applied Optics

Large Kerr index with amplification in an open four-level atomic system with twofold lower levels

Ali Raheli, Mostafa Sahrai, Abdolrahman Namdar, Rasoul Sadighi‐Bonabi

Published Nov 25, 2015• 0 citations
Publisher

Abstract

This paper presents a new freedom, which is the result of atomic injection and exit rates from a cavity associated with an open system, thus leading to a remarkable giant Kerr nonlinearity with applications in all-optical switching. The influence of atomic injection and exit rate from the cavity on nonlinear susceptibility of an open four-level Λ-type atomic system with twofold lower levels is investigated. It is found that large Kerr nonlinearity accompanied with probe gain can be obtained by adjusting the atomic injection rates and exit rate from the cavity, which is completely different from those presented in previous closed atomic systems. Phase control of Kerr nonlinearity in such an open atomic system is then studied.

DOI
10.1364/ao.54.010256

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