THEORETICAL-ANALYSIS OF SQUEEZED-LIGHT GENERATION BY 2ND-HARMONIC GENERATION

Theoretical analysis of squeezed light generation by phasematched SHG, applicable generally to various SHG configurations and appropriate fo r mutual comparison, is presented, The analysis is based on analytical solutions of the linearized differential equations in space coordinat e and the input-output equations for the amplitude fluctuations, and c alculations of squeezing spectra using the covariance matrixes, Formul ations describing the squeezing characteristics in terms of the device parameters are derived, Typical numerical results are also given to i llustrate the features of traveling-wave SHG, singly-resonant SHG, and doubly-resonant SHG configurations including cases where propagation losses are involved, The results, which are consistent with those in p revious work, provide many insights for design and application of SHG devices for squeezed-light generation.