Conoscopic interferometry for probing electro-optic coefficients of strontium calcium barium niobate crystal

The relation between the linear electro-optic effect and conoscopic interference has been investigated in a biased electro-optic crystal strontium calcium barium niobate (CSBN). Based on the change of interference patterns with applied field, an interferometric method for probing electro-optic coefficients of electro-optic crystals has been proposed. In our case, the linear electro-optic coefficients of CSBN:50 was first probed at γ 33=(141.0±0.5)×10 −12 m/V and γ 13=(85.0±0.5)×10 −12 m/V. ► A interferometric method for probing electro-optic coefficients of CSBN has been proposed. ► The linear electro-optic coefficients of CSBN was first calculated to be γ 33=(141.0±0.5)×10 −12 m/V and γ 13=(85.0±0.5)×10 −12 m/V. ► Investigation on conoscopic interference in biased CSBN.