Deep-UV-enhanced supercontinuum generated in tapered gas-filled photonic crystal fiber

TL;DR

This paper demonstrates a method to generate a broad supercontinuum spectrum extending into the deep ultraviolet using a tapered gas-filled photonic crystal fiber pumped by a compact infrared laser, achieving significant spectral power.

Contribution

It introduces a novel tapered gas-filled hollow-core photonic crystal fiber setup for deep-UV supercontinuum generation with high spectral power.

Findings

Supercontinuum extends from near-infrared to 213 nm in deep UV.

Achieves up to 0.83 mW/nm spectral power in deep UV.

Uses a single-stage, compact infrared laser source.

Abstract

We present the use of linearly down-tapered gas-filled hollow-core photonic crystal fiber in a single-stage, pumped with pulses from a compact infrared laser source, to generate a supercontinuum carrying significant spectral power in the deep ultraviolet (200 - 300 nm). The generated supercontinuum extends from the near infrared down to around 213 nm with up to 0.83 mW/nm in the deep ultraviolet.