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Multi-channel terahertz grating spectrometer with quantum-cascade laser and microbolometer array
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DOI：10.1063/1.3645635.png)
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We report on a terahertz absorption spectrometer, which combines a grating monochromator, a quantum-cascade laser (QCL), and a microbolometer camera. The emission modes of the laser are spectrally resolved by the monochromator and imaged onto the camera. An absorption cell is placed between the QCL and the monochromator, and the absorption spectrum of methanol around 3.4 THz is measured by integrating simultaneously the signal of each of its Fabry-Perot modes as a function of the laser driving current. The frequency coverage of the spectrometer is about 20 GHz. (C) 2011 American Institute of Physics. [doi:10.1063/1.3645635]
Keyword:
bolometers
quantum cascade lasers
terahertz spectroscopy
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3.6
论文数:
10.4W
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17.8W
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