Abstract
Optical parametric oscillation has been achieved in LiNbO3 in the range 1 to 1.08 μ with a peak parametric power of 38 × 103 W. The oscillator which was tuned both by rotation of the crystal in an external optical cavity and by the electro‐optic effect was pumped at 6943 Å by a ruby laser of 3 × 106 W peak power. The observed electro‐optic tuning agreed with that calculated from measured values of the electro‐optic coefficients.