Mode-locked dysprosium fiber laser: picosecond pulse generation from 2.97 to 3.30 µm

R. I. Woodward, M. R. Majewski, S. D. Jackson: Mode-locked dysprosium fiber laser: picosecond pulse generation from 2.97 to 3.30 µm. In: APL Photonics, 3 , pp. 116106, 2018, (Editor Featured Article. Highlighted by Laser Focus World: www.bit.ly/dy_lfw).

Abstract

Mode-locked fiber laser technology to date has been limited to sub-3 µm wavelengths, despite significant application-driven demand for compact pulse sources at longer wavelengths. Erbium- and holmium-doped fluoride fiber lasers incorporating a saturable absorber are emerging as promising pulse sources for 2.7–2.9 µm, yet it remains a major challenge to extend this coverage. Here, we propose a new approach using dysprosium-doped fiber with frequency shifted feedback (FSF). Using a simple linear cavity with an acousto-optic tunable filter, we generate ∼33 ps pulses with up to 2.7 nJ energy and 330 nm tunability from 2.97 to 3.30 µm (∼3000–3400 cm −1 )—the longest wavelength mode-locked fiber laser and the most broadly tunable pulsed fiber laser to date. Numerical simulations show excellent agreement with experiments and also offer new insights into the underlying dynamics of FSF pulse generation. This highlights the remarkable potential of both dysprosium as a gain material and FSF for versatile pulse generation, opening new opportunities for mid-IR laser development and practical applications outside the laboratory.

BibTeX (Download)

@article{Woodward_2018_aplp,
title = {Mode-locked dysprosium fiber laser: picosecond pulse generation from 2.97 to 3.30 µm},
author = {R. I. Woodward and M. R. Majewski and S. D. Jackson},
url = {http://www.riwoodward.com/publication_files/woodward_2018_fsf.pdf
http://bit.ly/dy_lfw},
doi = {10.1063/1.5045799},
year  = {2018},
date = {2018-11-06},
journal = {APL Photonics},
volume = {3},
pages = {116106},
abstract = {Mode-locked fiber laser technology to date has been limited to sub-3 µm wavelengths, despite significant application-driven demand for compact pulse sources at longer wavelengths. Erbium- and holmium-doped fluoride fiber lasers incorporating a saturable absorber are emerging as promising pulse sources for 2.7–2.9 µm, yet it remains a major challenge to extend this coverage. Here, we propose a new approach using dysprosium-doped fiber with frequency shifted feedback (FSF). Using a simple linear cavity with an acousto-optic tunable filter, we generate ∼33 ps pulses with up to 2.7 nJ energy and 330 nm tunability from 2.97 to 3.30 µm (∼3000–3400 cm −1 )—the longest wavelength mode-locked fiber laser and the most broadly tunable pulsed fiber laser to date. Numerical simulations show excellent agreement with experiments and also offer new insights into the underlying dynamics of FSF pulse generation. This highlights the remarkable potential of both dysprosium as a gain material and FSF for versatile pulse generation, opening new opportunities for mid-IR laser development and practical applications outside the laboratory.},
note = {Editor Featured Article. 
Highlighted by Laser Focus World: www.bit.ly/dy_lfw},
keywords = {fibre laser, mid-infrared, mode-locked},
pubstate = {published},
tppubtype = {article}
}