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Article Dans Une Revue Applied Physics B - Laser and Optics Année : 2011

Widely tunable THz synthesizer

Gaël Mouret
S. Eliet
M. Guinet
  • Fonction : Auteur
A. Cuisset
Robin Bocquet
  • Fonction : Auteur
  • PersonId : 1196820
  • IdRef : 096652578
T. Yasui
  • Fonction : Auteur

Résumé

The generation of cw-THz radiation by photomixing is particularly suited to the high resolution spectroscopy of gases; nevertheless, until recently, it has suffered from a lack of frequency metrology. Frequency combs are a powerful tool that can transfer microwave frequency standards to optical frequencies and a single comb has permitted accurate (10−8) THz frequency synthesis with a limited tuning range. A THz synthesizer composed of three extended cavity laser diodes phase locked to a frequency comb has been constructed and its utility for high resolution gas phase spectroscopy demonstrated. The third laser diode allows a larger tuning range of up to 300 MHz to be achieved without the need for large frequency excursions, while the frequency comb provides a versatile link to be established from any traceable microwave frequency standard. The use of a single frequency comb as a reference for all of the cw-lasers eliminates the dependency of synthesized frequency on the carrier envelope offset frequency. This greatly simplifies the frequency comb stabilization requirements and leads to a reduced instrument complexity.

Dates et versions

hal-02937589 , version 1 (14-09-2020)

Identifiants

Citer

Gaël Mouret, S. Eliet, M. Guinet, A. Cuisset, Robin Bocquet, et al.. Widely tunable THz synthesizer. Applied Physics B - Laser and Optics, 2011, 104 (4), pp.763-768. ⟨10.1007/s00340-011-4690-1⟩. ⟨hal-02937589⟩
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