Fourier-Transform Spectrometer with a Terahertz-Wave Parametric Generator(Optics and Quantum Electronics)
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概要
- 論文の詳細を見る
A novel terahertz (THz)-wave spectrometer that combines a bright broad-band source of a laser-pumped THz-wave parametric generator (TPG) and a Martin-Puplett interferometer was developed. The TPG was based on stimulated polariton scattering via the lowest A_1-symmetry mode in lithium niobate (LN). Broad-band THz-wave generation with nanosecond-pulse duration was achieved by single-pass pumping of the crystals with a Q-switched Nd : YAG laser. An array of silicon prisms was used to couple out THz waves efficiently. To optimize the output, various configurations of the LN crystals were examined. A peak power of 280 microwatts was achieved, and the spectral range extended from 30 to 120cm^<-1> (0.9-3.6 THz), due to the first- and second-order Stokes scattering processes. The THz-wave spectrometer system with a nitrogen-purge unit was of tabletop size and had a maximum resolution of 0.025cm^<-1> (750MHz). THz spectroscopic data measured with the spectrometer were also presented.
- 社団法人応用物理学会の論文
- 2002-01-15
著者
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ITO Hiromasa
Research Institute ofElectrical Communication, Tohoku University
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Shikata Jun-ichi
Research Institute Of Electrical Communication Tohoku University
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Kawase K
Riken Wako‐shi Jpn
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Kawase Kodo
Riken
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Taniuchi Tetsuo
Research Institute Of Electrical Communication Tohoku University
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Ito Hiromasa
Research Institute Of Electrical Communication Tohoku University
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Ito Hiromasa
Photo Dynamics Research Center Riken:research Institute Of Electrical Communication Tohoku Universit
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