Electrooptical compensation for self-heating in CD*A during second-harmonic generation

A pulsed electric field is used to fine tune the phase-matching conditions in temperature-tuned CD*A for second-harmonic generation (SHG) to 0.53 μ from a 1.06-μ laser. By changing the pulse-width of theEfield, the clamped and unclamped electrooptic (EO) effects are studied, resulting in the determination ofr₆₃ = 14.1 ± 0.4 × 10⁻¹⁰cm/V (electrooptic constant) and the productP₆₆d₃₆ = 10.2 ± 0.4 × 10⁻¹⁰cm/V (elastooptic and piezoelectric constants, respectively) at 102°C. A steady 57-percent efficient SHG was obtained for 10.4 W of 1.06 μ laser light in CDA. The usual instability caused by self-heating was eliminated electrooptically.