Evidence for frequency comb emission from a Fabry-Pérot terahertz quantum-cascade laser | Zendy

M. Wienold | Zendy; Benjamin Röben | Zendy; L. Schrottke | Zendy; H. T. Grahn | Zendy

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Evidence for frequency comb emission from a Fabry-Pérot terahertz quantum-cascade laser

Author(s) -

M. Wienold,

Benjamin Röben,

L. Schrottke,

H. T. Grahn

Publication year - 2014

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.22.030410

Subject(s) - terahertz radiation , fabry–pérot interferometer , quantum cascade laser , optics , cascade , frequency comb , laser , materials science , range (aeronautics) , photomixing , optoelectronics , terahertz spectroscopy and technology , far infrared laser , physics , terahertz metamaterials , chemistry , chromatography , composite material

We report on a broad-band terahertz quantum-cascade laser (QCL) with a long Fabry-Pérot ridge cavity, for which the tuning range of the individual laser modes exceeds the mode spacing. While a spectral range of approximately 60 GHz (2 cm(-1)) is continuously covered by current and temperature tuning, the total emission range spans more than 270 GHz (9 cm(-1)). Within certain operating ranges, we found evidence for stable frequency comb operation of the QCL. An experimental technique is presented to characterize frequency comb operation, which is based on the self-mixing effect.

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