Mode-locked and tunable fiber laser at the 3.5 µm band using frequency-shifted feedback
| Autor: | Matthew R. Majewski, Robert I. Woodward, Stuart D. Jackson, Nathaniel Bawden, David J. Ottaway, Ori Henderson-Sapir |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
business.industry Autocorrelator Physics::Optics Pulse duration 02 engineering and technology 021001 nanoscience & nanotechnology Laser 01 natural sciences Atomic and Molecular Physics and Optics law.invention 010309 optics Wavelength Optics Mode-locking law Fiber laser 0103 physical sciences Fiber 0210 nano-technology Absorption (electromagnetic radiation) business Physics - Optics |
| Zdroj: | Optics Letters. 45:224 |
| ISSN: | 1539-4794 0146-9592 |
| DOI: | 10.1364/ol.45.000224 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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