Mode-locked and tunable fiber laser at the 3.5 ${\mu}$m band using frequency-shifted feedback
Abstract
We report on a mid-infrared mode-locked fiber laser that uses an acousto-optic tunable filter to achieve frequency-shifted feedback pulse generation with frequency tuning over a 215 nm range. The laser operates on the 3.5 m transition in erbium-doped zirconium fluoride-based fiber and utilizes the dual-wavelength pumping scheme. Stable, self-starting mode-locking with a minimum pulse duration of 53 ps was measured using a two-photon absorption autocorrelator. The longest wavelength demonstrated was 3612 nm and a maximum average power of 208 mW was achieved. This is the longest wavelength rare-earth doped mode-locked fiber laser demonstrated to the best of the authors' knowledge. The broad tunability promises potential uses for environmental sensing applications.
Keywords
Cite
@article{arxiv.1909.11249,
title = {Mode-locked and tunable fiber laser at the 3.5 ${\mu}$m band using frequency-shifted feedback},
author = {Ori Henderson-Sapir and Nathaniel Bawden and Matthew R. Majewski and Robert I. Woodward and David J. Ottaway and Stuart D. Jackson3},
journal= {arXiv preprint arXiv:1909.11249},
year = {2020}
}