THERMAL-DEPENDENCE OF THE PRINCIPAL REFRACTIVE-INDEXES OF LITHIUM TRIBORATE

The thermal dependences of the principal refractive indices of lithium triborate (LBO) have been measured over an extended temperature range of 20-200-degrees-C with a Michelson interferometer. The data obtaine d are critically evaluated by prediction of the temperature dependence s of phase matching and the temperature bandwidth of LBO in a wide ran ge of circumstances (which include optical parametric oscillation, sec ond-harmonic generation, and sum-frequency-mixing generation), and clo se agreement with experimental observation is obtained in most cases.