Efficient soliton self-frequency shift in hydrogen-filled hollow-core fiber

TL;DR

This paper demonstrates efficient generation of tunable Raman solitons in hydrogen-filled hollow-core fiber using short pulses, achieving high energy and short duration, with potential for higher-energy pulses.

Contribution

It introduces a method for efficient soliton self-frequency shifting in hydrogen-filled fibers with detailed experimental and numerical analysis.

Findings

Raman solitons generated between 1080 and 1600 nm

Pulse energies up to 70 nJ at 1300 nm

Pulse durations around 45 fs

Abstract

We report a study of soliton self-frequency shifting in hydrogen-filled hollow-core fiber. The combination of hydrogen and short 40-fs input pulses underlies clean and efficient generation of Raman solitons between 1080 and 1600 nm. With 240-nJ input pulses, the Raman soliton energy ranges from 110 to 20 nJ over that wavelength range, and the pulse duration is approximately 45 fs. In particular, 70-nJ and 42-fs pulses are generated at 1300 nm. Numerical simulations agree reasonably well with experiments and predict that microjoule-energy tunable pulses should be possible with higher-energy input pulses.