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Nanosecond cw Visible-IR All-Optical Switching and Nonlinear Transmission with a Nonlinear Organic Optical Liquid in Bulk and Guided Wave Geometry

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7 Author(s)
I. C. Khoo ; Electrical Engineering Department, The Pennsylvania State University, University Park, PA 16802 ; A. Diaz ; J. Liou ; J. H. Park
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In this presentation, we describe another promising organic material that enables all-optical switching in an extremely wide time scales spanning sub-nanoseconds to cw regime - a nonlinear neat organic liquid (L34) in bulk or wave-guided [fiber core] structure. In the visible spectrum [400-700 nm], quantitative z-scan and pump-probe techniques have shown that in the sub-nanosecond time scales, the dominant nonlinear absorption processes are two-photon coupled to excited state absorption processes characterized by an intrinsic two photon absorption coefficient of ~5 cm/GW, and an intensity dependent effective two-photon absorption coefficient that can be over 200 cm/GW. For longer time scales, the transparency of the liquid allows doping with appropriate absorbers to generate efficient thermal/density and nonlinear scattering effects [as well as guided mode extinction in fiber geometry] for all-optical switching operations. Accordingly, one may envision single material constituent device capable of all-time scale optical switching applications.

Published in:

2007 Digest of the IEEE/LEOS Summer Topical Meetings

Date of Conference:

23-25 July 2007