Picosecond Optical Parametric Oscillator Achieving Near-Transform Limit Output and Its Design Method

Abstract

This invention belongs to the technical field of picosecond laser modulation, and discloses a picosecond optical parametric oscillator and its design method for achieving near-transform-limited output. The oscillator includes a pump source laser, an optical resonant cavity, a nonlinear crystal, and a dispersive element. The pump source laser provides pulsed pump light to the optical resonant cavity. The nonlinear crystal is placed in the optical path within the optical resonant cavity to convert the pump light into signal light and idler light. The optical resonant cavity is used to oscillate the signal light. The dispersive element is placed in the optical path within the optical resonant cavity to introduce group velocity dispersion into the signal light. Near-transform-limited pulse signal light and idler light are output from the optical resonant cavity. The dispersion of the dispersive element satisfies the requirements for achieving near-transform-limited output. The optical parametric oscillator mentioned in this invention can output near-transform-limited pulses, has a wide wavelength tuning range, high conversion efficiency, and also has the advantages of low cost and low loss.

Images