Spectral coherence properties of continuum generation in bulk crystals

TL;DR

This paper investigates the spectral coherence and phase stability of white-light continua generated in bulk crystals, analyzing how various parameters affect their mutual spectral stability and intensity-phase coupling.

Contribution

It provides a detailed experimental assessment of the phase stability and spectral coherence of continuum generation in bulk crystals, including measurement of coupling coefficients and stability regions.

Findings

Spectral stability depends on crystal position, interaction length, and pulse energy.

Intensity-to-phase coupling coefficients are quantified.

Stability regions are identified for different experimental parameters.

Abstract

The stability of the phase difference between two white-light continua, generated from the same 180-fs pulses at 1035\,nm, is assessed by a modified Bellini-Hansch interferometer. Mutual spectral stability is studied as a function of several parameters: position of the nonlinear crystal with respect to the beam waist, interaction length, and pulse energy. Intensity-to-phase coupling coefficients are measured and stability regions are identified.