Optoelectronic difference-frequency synthesiser: terahertz-waves for high-resolution spectroscopy

Aballea, L.; Constantin, L. F.

doi:10.1051/epjap:2008188

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Cited by 7 publications

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“…This type of system has successfully been applied to distributed Bragg reflector lasers yielding a final tuning range of 3 GHz and an accuracy of 10 −7 [ 31 ]. The second method that has been demonstrated uses acousto-optic modulators to provide a tuning range in the order of 10 MHz [ 32 ].…”

Section: Photomixing Spectrometermentioning

confidence: 99%

Recent Developments of an Opto-Electronic THz Spectrometer for High-Resolution Spectroscopy

Hindle

Yang

Mouret

et al. 2009

Sensors

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A review is provided of sources and detectors that can be employed in the THz range before the description of an opto-electronic source of monochromatic THz radiation. The realized spectrometer has been applied to gas phase spectroscopy. Air-broadening coefficients of HCN are determined and the insensitivity of this technique to aerosols is demonstrated by the analysis of cigarette smoke. A multiple pass sample cell has been used to obtain a sensitivity improvement allowing transitions of the volatile organic compounds to be observed. A solution to the frequency metrology is presented and promises to yield accurate molecular line center measurements.

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Section: Photomixing Spectrometermentioning

confidence: 99%