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Title: Z-scan technique for investigation of the noninstantaneous optical Kerr nonlinearity
Authors: Gu, B.
Wang, H.-T.
Ji, W. 
Issue Date: 15-Sep-2009
Citation: Gu, B., Wang, H.-T., Ji, W. (2009-09-15). Z-scan technique for investigation of the noninstantaneous optical Kerr nonlinearity. Optics Letters 34 (18) : 2769-2771. ScholarBank@NUS Repository.
Abstract: By treating laser-induced optical Kerr nonlinearity as a noninstantaneous decaying process, we present the pulse-duration-dependent Z-scan analytical expressions for an arbitrary aperture and an arbitrary nonlinear magnitude. This theory has the capacity to characterize the third-order nonlinear refraction induced by a laser pulse with its temporal duration being much longer than or comparable to the recovery time of the nonlinear effect. Through Z-scan measurements at different pulse durations, the nonlinear refractive coefficient and the recovery time could be determined unambiguously and simultaneously. Furthermore, the theory can be utilized to confirm whether the measured optical Kerr nonlinearity is instantaneous or noninstantaneous with respect to the given pulse duration. © 2009 Optical Society of America.
Source Title: Optics Letters
ISSN: 01469592
DOI: 10.1364/OL.34.002769
Appears in Collections:Staff Publications

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