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Abstract
The characteristics of the ferroelectric and the electro-optic properties was investigated on the transparent PLZT ceramics, which had a slim D-E loop. The coercive force Ec was 0.24 × 106 V/m and the remnant polarization Pr was 7.9 × 10−2 C/m2 for the typical composition of PLZT (9/65/35), applying AC 2 kV/mm at 50 Hz.
Transmittance of a PLZT electro-optic shutter was studied. The shutter was fabricated by PLZT wafer with a pair of slot electrode sandwiched between artificial polarizers under crossed Nicols. In order to evaluate the electro-optic hysteresis, the ratio of the half width to the applied voltage was employed, and was about 20% for PLZT (9/65/35), 13% for PLZT (10/65/35) and 8% for PLZT (9/69/31), in giving the maximum light intensity. The hysteresis of transmittance were decreased with increment of both La and Zr content, although the quadratic electro-optic coefficient was decreased.