Q-switched Dy:ZBLAN fiber lasers beyond 3 µm: comparison of pulse generation using acousto-optic modulation and inkjet-printed black phosphorus

R. I. Woodward, M. R. Majewski, N. Macadam, G. Hu, T. Albrow-Owen, T. Hasan, S. D. Jackson

Research output: Contribution to journalArticleResearchpeer-review

Abstract

We report high-energy mid-infrared pulse generation by Q-switching of dysprosium-doped fiber lasers for the first ti me. Two different modulation techniques are demonstrated. Firstly, using active acousto-optic modulation, pulses are produced with up to 12 µJ energy and durations as short as 270 ns, with variable repetition rates from 100 Hz to 20 kHz and central wavelengths tunable from 2.97 to 3.23 µm. Experiments are supported by numerical modeling, identifying routes for improved pulse energies and to avoid multi-pulsing by careful choice of modulator parameters. Secondly, we demonstrate passive Q-switching by fabricating an inkjet-printed black phosphorus saturable absorber, simplifying the cavity and generating 1.0 µJ pulses with 740 ns duration. The performance and relative merits of each modulation approach are then critically discussed. These demonstrations highlight the potential of dysprosium as a versatile gain medium for high-performance pulsed sources beyond 3 µm.

LanguageEnglish
Pages15032-15045
Number of pages14
JournalOptics Express
Volume27
Issue number10
DOIs
Publication statusPublished - 13 May 2019

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acousto-optics
fiber lasers
phosphorus
dysprosium
modulation
pulses
pulse modulation
energy
modulators
repetition
absorbers
routes
cavities
wavelengths

Bibliographical note

Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

Cite this

Woodward, R. I. ; Majewski, M. R. ; Macadam, N. ; Hu, G. ; Albrow-Owen, T. ; Hasan, T. ; Jackson, S. D. / Q-switched Dy:ZBLAN fiber lasers beyond 3 µm : comparison of pulse generation using acousto-optic modulation and inkjet-printed black phosphorus. In: Optics Express. 2019 ; Vol. 27, No. 10. pp. 15032-15045.
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Q-switched Dy:ZBLAN fiber lasers beyond 3 µm : comparison of pulse generation using acousto-optic modulation and inkjet-printed black phosphorus. / Woodward, R. I.; Majewski, M. R.; Macadam, N.; Hu, G.; Albrow-Owen, T.; Hasan, T.; Jackson, S. D.

In: Optics Express, Vol. 27, No. 10, 13.05.2019, p. 15032-15045.

Research output: Contribution to journalArticleResearchpeer-review

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