Tunable Q-switched fiber laser based on saturable edge-state absorption in few-layer molybdenum disulfide (MoS2)

R. I. Woodward, E. J. R. Kelleher, R. C. T. Howe, G. Hu, F. Torrisi, T. Hasan, S. V. Popov, J. R. Taylor: Tunable Q-switched fiber laser based on saturable edge-state absorption in few-layer molybdenum disulfide (MoS2). In: Optics Express, 22 (25), pp. 31113, 2014.

Abstract

We fabricate a few-layer molybdenum disulfide (MoS2) polymer composite saturable absorber by liquid-phase exfoliation, and use this to passively Q-switch an ytterbium-doped fiber laser, tunable from 1030 to 1070 nm. Self-starting Q-switching generates 2.88 $mu$s pulses at 74 kHz repetition rate, with over 100 nJ pulse energy. We propose a mechanism, based on edge states within the bandgap, responsible for the wideband nonlinear optical absorption exhibited by our few-layer MoS2 sample, despite operating at photon energies lower than the material bandgap.

BibTeX (Download)

@article{Woodward_oe_2014_mos2,
title = {Tunable Q-switched fiber laser based on saturable edge-state absorption in few-layer molybdenum disulfide (MoS2)},
author = { R. I. Woodward and E. J. R. Kelleher and R. C. T. Howe and G. Hu and F. Torrisi and T. Hasan and S. V. Popov and J. R. Taylor},
url = {http://www.riwoodward.com/publication_files/woodward_oe_2014_tuna.pdf},
doi = {10.1364/OE.22.031113},
year  = {2014},
date = {2014-01-01},
journal = {Optics Express},
volume = {22},
number = {25},
pages = {31113},
abstract = {We fabricate a few-layer molybdenum disulfide (MoS2) polymer composite saturable absorber by liquid-phase exfoliation, and use this to passively Q-switch an ytterbium-doped fiber laser, tunable from 1030 to 1070 nm. Self-starting Q-switching generates 2.88 $mu$s pulses at 74 kHz repetition rate, with over 100 nJ pulse energy. We propose a mechanism, based on edge states within the bandgap, responsible for the wideband nonlinear optical absorption exhibited by our few-layer MoS2 sample, despite operating at photon energies lower than the material bandgap.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}