Phase Noise Properties of Super-Continuum Generation in All-Normal Dispersion Fibers

Supercontinumm generation (SCG) in nonlinear media is a highly efficient method to extend the spectrum of femtosecond pulses and a crucial part of carrier-envelope phase stabilized systems, both for seed generation and f-to-2f interferometers. All-normal dispersion (ANDi) optical fibers have recently gained significant attention for SCG due to their ability to produce highly coherent spectra with low noise [1]. In previous a work, we introduced a modified Bellini-Hänsch interferometer to characterize the intrapulse coherence of a SCG in bulk materials [2]–[4]. Building on these studies, this work focuses on the experimental quantification of the spectral intrapulse coherence of SCG generated in a commercial ANDi polarization-maintaining (PM) fiber (NKT Photonics).