Generation of Broadband Mid-IR and UV Light in Gas-Filled Single-Ring Hollow-Core PCF

TL;DR

This paper demonstrates broadband supercontinuum generation from UV to mid-infrared in gas-filled single-ring hollow-core photonic crystal fiber pumped by 1.7 μm light, with tunable ultraviolet emission and pulse compression capabilities.

Contribution

It introduces a simple fiber design enabling broadband supercontinuum generation and tunable UV emission in gas-filled SR-PCF, advancing ultrafast light source technology.

Findings

Broad supercontinuum from 300 nm to 3.1 μm achieved

Ultraviolet dispersive waves tunable via pump wavelength

Effective pulse compression in near and mid-infrared regions

Abstract

We report generation of an ultrafast supercontinuum extending into the mid- infrared in gas-filled single-ring hollow-core photonic crystal fiber (SR-PCF) pumped by 1.7 $\mu$m light from an optical parametric amplifier. The simple fiber structure offers shallow dispersion and flat transmission in the near and mid-infrared, enabling the generation of broadband spectra extending from 300 nm to 3.1 $\mu$m, with a total energy of a few $\mu$J. In addition, we report the emission of ultraviolet dispersive waves whose frequency can be tuned simply by adjusting the pump wavelength. SR-PCF also provides an effective means of compressing and delivering tunable ultrafast pulses in the near and mid-infrared spectral regions.