Publikation:

An optical fiber integrated device for nonlinear generation of femtosecond mid-infrared pulses

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2024

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Deutsche Forschungsgemeinschaft (DFG): 425217212

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Applied Physics Letters. AIP Publishing. 2024, 124(26), 261103. ISSN 0003-6951. eISSN 1077-3118. Verfügbar unter: doi: 10.1063/5.0208093

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Compact and broadband mid-infrared (MIR) sources are in high demand because of a wide range of potential applications such as molecular sensing in the fingerprint region. The generation of coherent MIR radiation at arbitrary frequencies typically requires nonlinear mixing between at least two input waves, which is often cumbersome to implement. We present an integrated and, therefore, adjustment-free solution combining few-femtosecond pulse compression in a germanosilicate optical fiber and optical rectification. To this end, a 16-μm-thin GaSe crystal is directly mounted on the end facet of a highly nonlinear fiber assembly exploiting a focused ion beam. With input pulses of a minute energy of 5 nJ and a duration of 120 fs at the telecom wavelength of 1.55 μm, we directly obtain ultrabroadband and phase-stable output transients. Electro-optic sampling in free space reveals single-cycle pulses with spectral components covering the entire MIR from 10 to 120 THz.

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ISO 690KEMPF, Hannes, Matthias HAGNER, Philipp SULZER, Claudius RIEK, Alfred LEITENSTORFER, 2024. An optical fiber integrated device for nonlinear generation of femtosecond mid-infrared pulses. In: Applied Physics Letters. AIP Publishing. 2024, 124(26), 261103. ISSN 0003-6951. eISSN 1077-3118. Verfügbar unter: doi: 10.1063/5.0208093
BibTex
@article{Kempf2024optic-70460,
  year={2024},
  doi={10.1063/5.0208093},
  title={An optical fiber integrated device for nonlinear generation of femtosecond mid-infrared pulses},
  number={26},
  volume={124},
  issn={0003-6951},
  journal={Applied Physics Letters},
  author={Kempf, Hannes and Hagner, Matthias and Sulzer, Philipp and Riek, Claudius and Leitenstorfer, Alfred},
  note={Article Number: 261103}
}
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