Measurement of the electro-optic coefficient dispersion in poled polymer materials

Yongqiang Shi; James H. Bechtel; Srinath Kalluri; William H. Steier; Chengzeng Xu; Bo Wu; Larry Raymond Dalton

doi:10.1117/12.187509

23 September 1994 Measurement of the electro-optic coefficient dispersion in poled polymer materials

Yongqiang Shi, James H. Bechtel, Srinath Kalluri, William H. Steier, Chengzeng Xu, Bo Wu, Larry Raymond Dalton

Author Affiliations +

Proceedings Volume 2285, Nonlinear Optical Properties of Organic Materials VII; (1994) https://doi.org/10.1117/12.187509
Event: SPIE's 1994 International Symposium on Optics, Imaging, and Instrumentation, 1994, San Diego, CA, United States

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.

Citation Download Citation

Yongqiang Shi, James H. Bechtel, Srinath Kalluri, William H. Steier, Chengzeng Xu, Bo Wu, and Larry Raymond Dalton "Measurement of the electro-optic coefficient dispersion in poled polymer materials", Proc. SPIE 2285, Nonlinear Optical Properties of Organic Materials VII, (23 September 1994); https://doi.org/10.1117/12.187509

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