Mode-locked and tunable fiber laser at the 3.5  µm band using frequency-shifted feedback

O. Henderson-Sapir, N. Bawden, M. R. Majewski, R. I. Woodward, D. J. Ottaway, S. D. Jackson: Mode-locked and tunable fiber laser at the 3.5  µm band using frequency-shifted feedback. In: Optics Letters, 45 (1), pp. 224, 2020.

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 µm 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 the maximum average powers achieved were 50 and 167 mW in fundamental and multi-pulse mode-locking regimes, respectively. To the best of our knowledge, this is the longest wavelength rare-earth-doped mode-locked fiber laser demonstrated. The broad tunability promises potential uses for environmental sensing applications.

BibTeX (Download)

@article{Henderson-Sapir2020,
title = {Mode-locked and tunable fiber laser at the 3.5  µm band using frequency-shifted feedback},
author = {O. Henderson-Sapir and N. Bawden and M. R. Majewski and R. I. Woodward and D. J. Ottaway and S. D. Jackson},
url = {https://riwoodward.com/publication_files/hendersonsapir_2019_fsf.pdf},
doi = {10.1364/OL.45.000224},
year  = {2020},
date = {2020-01-01},
journal = {Optics Letters},
volume = {45},
number = {1},
pages = {224},
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 µm 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 the maximum average powers achieved were 50 and 167 mW in fundamental and multi-pulse mode-locking regimes, respectively. To the best of our knowledge, this is the longest wavelength rare-earth-doped mode-locked fiber laser demonstrated. The broad tunability promises potential uses for environmental sensing applications.},
keywords = {fibre laser},
pubstate = {published},
tppubtype = {article}
}