We have characterized the effective linear electro-optic coefficients of YCa<sub>4</sub>O (BO<sub>3</sub>)<sub>3</sub> (YCOB) relative to KH<sub>2</sub>PO <sub>4</sub> and KD<sub>2</sub>PO <sub>4</sub> at 632.8 nm. We measured a maximum <i>r</i><sub>eff</sub> value of 10.8±1.4pm/V for YCOB in a transverse electric field configuration for propagation along the X or the α dielectric axis, with the electric field applied along the Z or the γ dielectric axis. We also found effective coefficients of 10.7±1.0 and 3.4±0.4pm/V for YCOB in longitudinal configurations. The remaining values of <i>r</i><sub>eff</sub> for various transverse applied voltages were found to be less than 3 pm/V. The excellent thermomechanical properties of this crystal, coupled with moderate electro-optic coefficients, make YCOB and its isomorphs potential candidates for use as high-average-power electro-optic switches.
© 2003 Optical Society of America
J. J. Adams and C. A. Ebbers, "Linear electro-optic properties of YCa4O(BO3)3," Opt. Lett. 28, 1469-1471 (2003)