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Terahertz laser frequency combs

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TLDR
In this article, frequency combs based on terahertz quantum cascade lasers are demonstrated, which combine the high power of lasers with the broadband capabilities of pulsed sources. But their performance was limited to 3.5 THz.
Abstract
Frequency combs based on terahertz quantum cascade lasers, which combine the high power of lasers with the broadband capabilities of pulsed sources, are demonstrated. The frequency combs generate 5 mW of terahertz power covering a frequency range of almost 500 GHz and produce more than 70 lines at 3.5 THz.

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Journal ArticleDOI

The 2017 terahertz science and technology roadmap

TL;DR: The 2017 roadmap of terahertz frequency electromagnetic radiation (100 GHz-30 THz) as discussed by the authors provides a snapshot of the present state of THz science and technology in 2017, and provides an opinion on the challenges and opportunities that the future holds.
Journal ArticleDOI

Frequency comb spectroscopy

TL;DR: In this paper, a review of the developments in the emerging and rapidly advancing field of atomic and molecular broadband spectroscopy with frequency combs is presented. But this review is limited to the use of laser frequency combers.
Journal ArticleDOI

Dual-comb spectroscopy based on quantum-cascade-laser frequency combs

TL;DR: Broadband high resolution molecular spectroscopy is performed, showing the potential of quantum cascade laser combs as a compact, all solid-state, chemical sensor.
Journal ArticleDOI

Quantum cascade lasers: 20 years of challenges.

TL;DR: The most recent technological and application advances of quantum cascade lasers are reviewed, underlining the present milestones and future directions from the Mid-infrared to the Terahertz spectral range.
References
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Journal ArticleDOI

Materials for terahertz science and technology

TL;DR: Terahertz spectroscopy and imaging provide a powerful tool for the characterization of a broad range of materials, including semiconductors and biomolecules, as well as novel, higher-power terahertz sources.
Journal ArticleDOI

Optical frequency metrology

TL;DR: The ability to count optical oscillations of more than 1015 cycles per second facilitates high-precision optical spectroscopy, and has led to the construction of an all-optical atomic clock that is expected eventually to outperform today's state-of-the-art caesium clocks.
Journal ArticleDOI

Terahertz semiconductor-heterostructure laser

TL;DR: A monolithic terahertz injection laser that is based on interminiband transitions in the conduction band of a semiconductor (GaAs/AlGaAs) heterostructure is reported, which is very promising for extending the present laser concept to continuous-wave and high-temperature operation, which would lead to implementation in practical photonic systems.

Terahertz semiconductor heterostructure laser

TL;DR: In this article, a monolithic terahertz injection laser that is based on interminiband transitions in the conduction band of a semiconductor (GaAs/AlGaAs) heterostructure is presented.
Journal ArticleDOI

Microresonator-Based Optical Frequency Combs

TL;DR: A new optical frequency comb generation principle has emerged that uses parametric frequency conversion in high resonance quality factor (Q) microresonators, permitting an increased number of comb applications, such as in astronomy, microwave photonics, or telecommunications.
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