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Proceedings Paper

Real-time measurement for the electro-optic coefficient of a poled-polymer film in ATR configuration
Author(s): Bo Yuan; Zhuangqi Cao; Qishun Shen; Yingli Chen; X. Dou; Hideo Tashiro
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Paper Abstract

A new method which bases on the attenuated total reflection (ATR) technique is developed to determine the electro-optic coefficient of a poled-polymer film. The proposed ATR arrangement consists of a coupling prism, and four film layers deposited directly onto the base of the prism in sequence. The four film layers are metal film (which serves as a top electrode), poled polymer film, buffer and base electrode, respectively. A convergent light beam covering a suitable angular range is incident onto the prism base to excite a guided wave mode and the reflected light beam is imaged by a CCD array. Then resonance angle of the guided wave mode can be determined from the position of the reflectance minimum. It is demonstrated that the applying electrical field will cause a minute change in the refractive index of a poled- polymer film, due to the Pockles effect, which will result in a shift of the resonance angle. In order to make the measurement more successful, computer image processing method and optical image spatial filter technology are used in our measurement.

Paper Details

Date Published: 9 October 2000
PDF: 5 pages
Proc. SPIE 4221, Optical Measurement and Nondestructive Testing: Techniques and Applications, (9 October 2000); doi: 10.1117/12.402602
Show Author Affiliations
Bo Yuan, Shanghai Jiao Tong Univ. (China)
Zhuangqi Cao, Shanghai Jiao Tong Univ. (China)
Qishun Shen, Shanghai Jiao Tong Univ. (China)
Yingli Chen, Shanghai Jiao Tong Univ. (China)
X. Dou, Shanghai Jiao Tong Univ. (United States)
Hideo Tashiro, The Institute of Physical and Chemical Research (RIKEN) (Japan)


Published in SPIE Proceedings Vol. 4221:
Optical Measurement and Nondestructive Testing: Techniques and Applications

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