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Proceedings Paper

Measurement of the electro-optic coefficient dispersion in poled polymer materials
Author(s): Yongqiang Shi; James H. Bechtel; Srinath Kalluri; William H. Steier; Chengzeng Xu; Bo Wu; Larry Raymond Dalton
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Paper Abstract

A simple and easy method to study the dispersion of electro-optic coefficients of poled second- order nonlinear optical polymer films is presented. Phase grating type electro-optic modulators were used to measure the relative electro-optic effects at different wavelengths. The grating structures were formed by either etching a grating in the nonlinear polymer thin films or defining a transparent electrode on top of a uniform polymer film. When an AC voltage is applied to the electrodes, the diffraction efficiency of the grating is modulated by the small index modulation. The measurement of the electro-optic response can be carried over a large wavelength range, even deep into the absorption band of the material due to the short interaction length of the optical beam and the polymer thin film. The grating modulation method uses a single optical beam in a transmission arrangement which requires little optical alignment and no polarization optics. With a properly designed electrode, the grating modulator can also be used in measuring the electro-optic coefficient, r13, of the poled polymer films. Other measurement applications such as monitoring temporal, thermal, and photo-excitation stability are discussed.

Paper Details

Date Published: 23 September 1994
PDF: 10 pages
Proc. SPIE 2285, Nonlinear Optical Properties of Organic Materials VII, (23 September 1994); doi: 10.1117/12.187509
Show Author Affiliations
Yongqiang Shi, TACAN Corp. (United States)
James H. Bechtel, TACAN Corp. (United States)
Srinath Kalluri, Univ. of Southern California (United States)
William H. Steier, Univ. of Southern California (United States)
Chengzeng Xu, Univ. of Southern California (United States)
Bo Wu, Univ. of Southern California (United States)
Larry Raymond Dalton, Univ. of Southern California (United States)

Published in SPIE Proceedings Vol. 2285:
Nonlinear Optical Properties of Organic Materials VII
Gustaaf R. Moehlmann, Editor(s)

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