All-fiber frequency comb at 2 µm providing 1.4-cycle pulses
| Autor: | Abijith S. Kowligy, Sida Xing, Daniel M. B. Lesko, Scott A. Diddams, Alexander J. Lind |
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| Rok vydání: | 2020 |
| Předmět: |
Offset (computer science)
Materials science business.industry Pulse duration chemistry.chemical_element 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Atomic and Molecular Physics and Optics 010309 optics Erbium Frequency comb Optics All fiber chemistry Fiber laser 0103 physical sciences 0210 nano-technology business Ultrashort pulse Photonic-crystal fiber |
| Zdroj: | Optics letters. 45(9) |
| ISSN: | 1539-4794 |
| Popis: | We report an all-fiber approach to generating sub-2-cycle pulses at 2 µm and a corresponding octave-spanning optical frequency comb. Our configuration leverages mature erbium:fiber laser technology at 1.5 µm to provide a seed pulse for a thulium-doped fiber amplifier that outputs 330 mW average power at a 100 MHz repetition rate. Following amplification, nonlinear self-compression in fiber decreases the pulse duration to 9.5 fs, or 1.4 optical cycles. The spectrum of the ultrashort pulse spans from 1 to beyond 2.4 µm and enables direct measurement of the carrier-envelope offset frequency. Our approach employs only commercially available fiber components, resulting in a design that is easy to reproduce in the larger community. As such, this system should be useful as a robust frequency comb source in the near-infrared or as a pump source to generate mid-infrared frequency combs. |
| Databáze: | OpenAIRE |
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