Investigation on birefringence property in uniaxial crystal (Ca0.28Ba0.72)0.75(Sr0.60Ba0.40)Nb2O6 by Ch. Y. Gao, H. R. Xia, J. Q. Xu, Sh. Ch. Si, H. J. Zhang, and J. Y. Wang

Crystal Research and Technology

Cryst. Res. Technol. 43, 443 (2008) - Abstract -

Investigation on birefringence property in uniaxial crystal (Ca_0.28Ba_0.72)_0.75(Sr_0.60Ba_0.40)Nb₂O₆

Ch. Y. Gao, H. R. Xia, J. Q. Xu, Sh. Ch. Si, H. J. Zhang*, and J. Y. Wang*

School of Physics and Microelectronics of Shandong University, Jinan, 250100, P. R. China
*Institute of Crystal Materials, Shandong University, Jinan, 250100, P. R. China

Keywords	birefringence, polarization, quarter wave-plate, conoscopic interference
PACS	42.70.Mp, 42.65.-k, 74.25.Gz
DOI	10.1002/crat.200710989

The birefringence of (Ca_0.28Ba_0.72)_0.75(Sr_0.60Ba_0.40)Nb₂O₆ crystal is measured basing on polarization- extinction method and conoscopic interference method. Experimental results show that the birefringence in this crystal is up to 10^-5, the natural birefringence in this crystal is (n_o-n_e) = 5.89 x 10^-5 with the He-Ne laser wavelength at 632.8nm and the birefringence grads with wavelength at 532nm is 5.68 x 10^-5, which indicate the good optical homogeneity of this crystal.

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