23 July 1993 Second-harmonic generation studies of crosslinkable nonlinear optical copolymers
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Proceedings Volume 1852, Nonlinear Optical Properties of Advanced Materials; (1993) https://doi.org/10.1117/12.148456
Event: OE/LASE'93: Optics, Electro-Optics, and Laser Applications in Scienceand Engineering, 1993, Los Angeles, CA, United States
Abstract
Polymethacrylate copolymers, containing non-linear optically active 4'-dialkylamino-4-nitro- azobenzene side groups and crosslinkable 2-butenyl side groups have been studied. Films of these copolymers can be thermally crosslinked at elevated temperatures and photochemically crosslinked by exposure with UV light; both methods allow the control of the crosslinking density. In situ second harmonic generation (SHG) of a Nd-YAG laser (1.064 micrometers ) while poling was used to study films with different degrees of pre-crosslinking. A pre-crosslinking step, prior to the corona poling step, can be applied to optimize alignment and relaxation of the chromophores. Depending on the conditions of pre-crosslinking, the SHG signal intensity and the alignment stability can be maximized.
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Khashayer Pakbaz, Khashayer Pakbaz, Nobuhiro Kawatsuki, Nobuhiro Kawatsuki, Hans-Werner Schmidt, Hans-Werner Schmidt, } "Second-harmonic generation studies of crosslinkable nonlinear optical copolymers", Proc. SPIE 1852, Nonlinear Optical Properties of Advanced Materials, (23 July 1993); doi: 10.1117/12.148456; https://doi.org/10.1117/12.148456
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