Micro-joule sub-10-fs VUV pulse generation by MW pump pulse using highly efficient chirped-four-wave mixing in hollow-core photonic crystal fibers

TL;DR

This paper theoretically demonstrates a method to generate sub-10-fs VUV pulses with high energy efficiency using chirped four-wave mixing in hollow-core photonic crystal fibers, potentially simplifying laser systems.

Contribution

It introduces a novel approach for efficient VUV pulse generation with broad bandwidth and high energy in hollow-core fibers using chirped four-wave mixing.

Findings

Sub-10-fs VUV pulses with hundreds of microjoules energy predicted.

Energy conversion efficiency up to 30%.

Feasible in kagome-lattice hollow-core PCF with noble gas filling.

Abstract

We theoretically study chirped four-wave mixing for VUV pulse generation in hollow-core photonic crystal fibers. We predict the generation of sub-10-fs VUV pulses with energy of up to hundreds of microjoule by broad-band chirped idler pulses at 830 nm and MW pump pulses with narrow-band at 277 nm. MW pump could be desirable to reduce the complexity of the laser system or use a high repetition rate-laser system. The energy conversion efficiency from pump pulse to VUV pulse reaches to 30%. This generation can be realized in kagome-lattice hollow-core PCF filled with noble gas of high pressure with core-diameter less than 40 micrometers which would enable technically simple or highly efficient coupling to fundamental mode of the fiber.