Nonlinear Optical and Electroactive Polymers pp 137-155 | Cite as
Femtosecond Studies of Dephasing and Phase Conjugation With Incoherent Light
Abstract
The fast response of electroactive polymers as nonlinear optical materials is one of the main features which are attracting attention of increasing number of researchers. Especially, the large optical nonlinearity of organic polymeric systems containing conjugated π-electron structures is expected to have response times in femtosecond regime because of their purely electronic origins. Some of them are regarded as attractive candidates for ultrafast optical processing devices, and a switching time of 0.1 ps is suggested for an optical switch utilizing a polydiacetylene as a nonlinear material.1 Studies of the fast response of optical nonlinearity are most simply performed by transient four-wave mixing, and optical nonlinearities of several organic materials have been studied by transient four-wave mixing using short optical pulses.2–6 In this article, we describe femtosecond and picosecond measurements of relaxation times of optical nonlinearity by three types of four-wave mixing using temporally incoherent light instead of short pulses.
Keywords
Phase Conjugation Normalize Signal Intensity Dephasing Time Optical Kerr Effect Polarization ConfigurationPreview
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