Polarization-resolved supercontinuum generated in a germania-doped photonic crystal fiber
Open Access
- 18 February 2021
- journal article
- research article
- Published by IOP Publishing in Journal of Physics: Photonics
- Vol. 3 (2), 025002
- https://doi.org/10.1088/2515-7647/abe7d9
Abstract
We characterize the polarization properties of a supercontinuum (SC) generated in a GeO2-doped photonic crystal fiber (PCF) to reveal the interplay between nonlinear broadening mechanisms of a pulse propagating in two independent fundamental modes associated to the principal axes of the fiber. Notably, we resolve self-phase modulation, self-shifted Raman solitons and dispersive waves within a set of orthogonal polarization states as they contribute to generate a broad spectrum spanning from 450 to 2150 nm. Interestingly, our experimental results feature a high degree of polarization at the edges of the spectrum in comparison to the region near the pump wavelength. We show that this modulation is caused by nonlinear spectral broadening. We also identify an additional depolarization mechanism preferentially acting on shorter wavelengths, indicative of a Rayleigh-like scattering effect due to the presence of intrinsic sub-wavelength defects in the fiber. Experiments rely on a free-space grating-based monochromator and a broadband polarizer to monitor the output SC and its linear polarization components along the principal axes of the PCF. Our results and experimental technique pave the way toward an improved standard for the characterization of broadband optical spectra and more efficient implementation of highly nonlinear fibers in a large range of polarization-sensitive applications.Keywords
Funding Information
- Natural Sciences and Engineering Research Council of Canada (35269)
- British Council (Newton-Bhabha Fellowship)
- Central Glass and Ceramic Research Institute (IF150744)
- Engineering and Physical Sciences Research Council (CHAMP)
- Government of Ontario (Ontario Graduate Scholarship)
This publication has 40 references indexed in Scilit:
- Partially coherent seeding of supercontinuum generation in picosecond regimeOptics & Laser Technology, 2019
- Supercontinuum radiation in fluorescence microscopy and biomedical imaging applicationsJournal of the Optical Society of America B, 2019
- Mid-infrared flattened supercontinuum generation in all-normal dispersion tellurium chalcogenide fiberOptics Express, 2019
- Supercontinuum-based Fourier transform infrared spectromicroscopyOptica, 2018
- Mid-infrared dispersive wave generation in gas-filled photonic crystal fibre by transient ionization-driven changes in dispersionNature Communications, 2017
- Generation of broadband mid-IR and UV light in gas-filled single-ring hollow-core PCFOptics Express, 2017
- Vacuum-ultraviolet to infrared supercontinuum in hydrogen-filled photonic crystal fiberOptica, 2015
- IR microscopy utilizing intense supercontinuum light source.Optics Express, 2012
- Ultrafast nonlinear optics in gas-filled hollow-core photonic crystal fibers [Invited]Journal of the Optical Society of America B, 2011
- Ultrabroadband supercontinuum generation from ultraviolet to 6.28 μm in a fluoride fiberApplied Physics Letters, 2009