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Experimental study of photoinduced birefringence in azo-dye-doped polymer

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Under varying intensities and polarization of the exciting light respectively, the photoinduced birefringence of azo dye polymer film placed between a pair of orthogonal polarizers is studied by measuring the transmitted intensity. It is concluded that the saturation and stable values of the transmitted intensity are all proportional to the intensity of exciting light. Both values also relate to the polarization direction of the exciting light, and when the angle Θ between the polarization directions of the probe intensity and the exciting light is lager than 10°, the saturation and stable values of the transmitted light are all proportional to sin2 2Θ. In addition, the birefringence of the sample was measured accurately by using a compensator.

Document Type: Research Article


Affiliations: Photonics Center, Institute of Physics, Nankai University, Tianjin, 300071, People's Republic of China

Publication date: September 1, 2004


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