Numerical simulations of optical parametric amplification cross-correlation frequency-resolved optical gating

Abstract

We perform numerical simulations of cross-correlation frequency-resolved optical gating with the nonlinearities, optical parametric amplification, and difference-frequency generation for measuring broadband pulses. We show that use of a noncollinear beam geometry that matches the group velocities of the pump, signal, and idler pulses permits use of relatively thick crystals for high gain without significant distortion in the measured trace, yielding bandwidths of ϳ100 nm.

Intensity–phase characterization of white-light continuum generated in sapphire by 280 fs laser pulses at 1053 nm

“…The time-frequency distribution provided by the cross-correlation frequency-resolved optical gating (XFROG) technique provides a particularly useful representation for the complex temporal and spectral evolution associated with WLC generation. For instance, in previous experiments the XFROG technique was successfully used for characterizing the continuum generation in photonic-crystal fibres or microstructure fibres [23,24], and the continuum generated by 800 nm pulses in bulk media such as CaF 2 , sapphire and fused silica was measured by using the related techniques of difference frequency generation XFROG and optical parametric amplification XFROG [25][26][27][28].…”

Cross-correlation frequency-resolved optical gating of white-light continuum (500–900 nm) generated in bulk media by 1053 nm laser pulses

“…Cao et al [10] used the shorter length PCF in XFROG setup with crystal dithering to characterize the continuum generated in the propagation regime of the fiber and supercontinuum generation was characterized by employing XFROG, which was generated from PCF [11]. Zhang and Liu et al [12][13][14] employed complex techniques like optical parametric amplification XFROG (OPA-XFROG) and difference frequency XFROG (DF-XFROG). Lee et al [15] reported an alternative approach of single-short measurement of continuum pulses using transient grating XFROG (TG-XFROG) a third-order nonlinear medium, but in practice they were limited to acquiring five to six shots.…”