Frequency-agile terahertz-wave spectrometer for high-resolution gas sensing

2007 ◽  
Vol 90 (12) ◽  
pp. 121127 ◽  
Author(s):  
Ruixiang Guo ◽  
Koichi Akiyama ◽  
Hiroaki Minamide ◽  
Hiromasa Ito
Keyword(s):  
High Resolution ◽  
Gas Sensing ◽  
Terahertz Wave ◽  
Frequency Agile ◽  
Wave Spectrometer

3.5-μm high-resolution gas sensing employing a LiNbO3 QPM-DFG waveguide module

2008 ◽  
Vol 94 (3) ◽  
pp. 517-525 ◽  
Author(s):  
L. Ciaffoni ◽  
R. Grilli ◽  
G. Hancock ◽  
A. J. Orr-Ewing ◽  
R. Peverall ◽  
...  
Keyword(s):  
High Resolution ◽  
Gas Sensing

Frequency-agile injection-seeded terahertz-wave parametric generation: publisher’s note

2020 ◽  
Vol 45 (3) ◽  
pp. 627
Author(s):  
Yoshikiyo Moriguchi ◽  
Yu Tokizane ◽  
Yuma Takida ◽  
Kouji Nawata ◽  
Shigenori Nagano ◽  
...  
Keyword(s):  
Terahertz Wave ◽  
Parametric Generation ◽  
Frequency Agile

Wideband and high-resolution coherent optical transients with a frequency-agile laser oscillator

2006 ◽  
Vol 31 (22) ◽  
pp. 3264 ◽  
Author(s):  
V. Crozatier ◽  
G. Gorju ◽  
J.-L. Le Gouët ◽  
F. Bretenaker ◽  
I. Lorgeré
Keyword(s):  
High Resolution ◽  
Laser Oscillator ◽  
Frequency Agile ◽  
Optical Transients

High Resolution Spectroscopy of HCN Isotopomers: H13CN, HC15N, and H13C15N in the Ground and First Excited Bending Vibrational State

2004 ◽  
Vol 59 (11) ◽  
pp. 861-874 ◽  
Author(s):  
U. Fuchs ◽  
S. Brünken ◽  
G.W. Fuchs ◽  
S. Thorwirth ◽  
V. Ahrens ◽  
...  
Keyword(s):  
High Resolution ◽  
Vibrational State ◽  
High Resolution Spectroscopy ◽  
Molecular Constants ◽  
Data Set ◽  
Quantum Numbers ◽  
Terahertz Applications ◽  
Global Fit ◽  
Mode A ◽  
Wave Spectrometer

The eleven energetically lowest pure rotational transitions, J ←J−1 (J =1,2, . . . ,11), of H13CN, H13C15N, and HC15N in the ground and first excited bending state were measured. By operating the Cologne Tetrahertz Wave Spectrometer up to 1 THz in the sub-Doppler mode, a transition frequency accuracy of a few kHz is achieved. These measurements were carried out at frequencies between 80 - 950 GHz. In addition, some transitions of the three isotopomers with rotational quantum numbers J = 20,21,22,23 have been measured in Doppler-limited resolution near 2 THz, using the frequency stabilized Cologne Sideband Spectrometer for Terahertz Applications (COSSTA). Furthermore, direct l-type transitions of H13CN in the first excited bending state with J up to 35 have been measured. These new data are of particular importance, since we discovered highly excited circumstellar H12CN recently. A global fit of the newly enlarged data set together with existing carefully screened ro-vibrational data yields molecular constants which are highly reliable and of great importance both for astrophysical observations and laboratory applications

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