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

Opt Lett. 2021 Sep 15;46(18):4526-4529. doi: 10.1364/OL.435697.

Abstract

We present the use of a linearly down-tapered gas-filled hollow-core photonic crystal fiber in a single stage, pumped with pulses from a compact infrared (IR) laser source, to generate a supercontinuum (SC) carrying significant spectral power in the deep ultraviolet (UV) [200-300 nm]. The generated SC extends from the near IR down to ∼213nm with 0.58 mW/nm and down to ∼220nm with 0.83 mW/nm in the deep UV.