| Autor: |
Woodward, R. I., Majewski, M. R., Macadam, N., Hu, G., Albrow-Owen, T., Hasan, T., Jackson, S. D. |
| Rok vydání: |
2019 |
| Předmět: |
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| Zdroj: |
Optics Express 27, 15032 (2019) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1364/OE.27.015032 |
| Popis: |
We report high-energy mid-infrared pulse generation by Q-switching of dysprosium-doped fiber lasers for the first time. Two different modulation techniques are demonstrated. Firstly, using active acousto-optic modulation, pulses are produced with up to 12 {\mu}J 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 {\mu}m. 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 {\mu}J 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 {\mu}m. |
| Databáze: |
arXiv |
| Externí odkaz: |
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