NDLI: Improved second order nonlinear optical polymers by covalent attachment comparison of four different thermally stable systems

Content Provider	IEEE Xplore Digital Library
Author	Kalluri, S. Steier, W.H. Chengzeng Xu Bo Wu Becker, M.W. Zhixin Yang Dalton, L.R. Yongqiang Shi Bechtel, J.H.
Copyright Year	1994
Description	Author affiliation: Center for Photonic Technol., Univ. of Southern California, Los Angeles, CA, USA (Kalluri, S.; Steier, W.H.)
Abstract	The practical implementation of polymers into electro-optic and nonlinear optical (NLO) devices requires thermally stable polymers with high optical nonlinearities. The nonlinear moieties (chromophores) can be either doped or covalently incorporated into the different classes of polymer matrices: polyimides, sol-gels, thermosetting, thermoplastic, etc. Although incorporation of covalently attached chromophores along with a means of thermally stabilizing the poling alignment involves difficult synthesis work, its advantages over doping, namely, high chromophore density reduced phase separation, and improved nonlinearity and thermal stability, make it the route of choice. We report here on four different approaches to improved long term thermal stability of the poling and the NLO effect. Two crosslinking polymers, one, "side-chain 1" in which the synthesized polymer contains the chromophore as a side chain and is crosslinked during poling to anchor both ends of the chromophore and one, "tri-linked" in which the synthesized chromophore containing prepolymer is crosslinked into a 3D polymer matrix during poling, are discussed. In the second material, the crosslinker also contains the chromophore to increase the chromophore loading. We also report on a polyimide material in which the chromophore is included as a side chain in the polyamic acid precursor polymer and immidization takes place during poling. In the fourth approach, the chromophore is covalently attached to a sol-gel system which is cured during poling.
Starting Page	191
Ending Page	193
File Size	242272
Page Count	3
File Format	PDF
ISBN	0780314735
DOI	10.1109/NLO.1994.470838
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1994-07-25
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Optical polymers Thermal stability Temperature Polyimides Nonlinear optics Optical devices Wavelength measurement Thermal engineering Nonlinear optical devices Corona
Content Type	Text
Resource Type	Article

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