Spectral correlation of the components of a two-frequency tunable laser

An investigation was made of the statistical properties of the radiation spectrum of a pulsed tunable laser emitting at two wavelengths simultaneously, λ₁ and λ₂. The correlation between the instantaneous and average values of λ₁ and λ₂ was studied, and it was found that under conditions of asymmetric limitations of the field in the resonator and a dynamic lens induced by the pump radiation in the active medium, the change in the average wavelengths of the components is characterized by a high correlation coefficient K > 0.8. These results offer the prospect of improved accuracy in measurements involving two-frequency lasers.