scholarly journals Instrument line shape function of laser heterodyne spectrometer

2019 ◽  
Vol 68 (6) ◽  
pp. 064208
Author(s):  
Xing-Ji Lu ◽  
Zhen-Song Cao ◽  
Tu Tan ◽  
Yin-Bo Huang ◽  
Xiao-Ming Gao ◽  
...  
Keyword(s):  
Line Shape ◽  
Shape Function ◽  
Laser Heterodyne ◽  
Heterodyne Spectrometer ◽  
Line Shape Function

Kubo’s Line Shape Function for a Linear-Quadratic Chromophore–Solvent Coupling

2014 ◽  
Vol 119 (29) ◽  
pp. 9006-9008 ◽  
Author(s):  
Dmitry V. Matyushov
Keyword(s):  
Line Shape ◽  
Shape Function ◽  
Linear Quadratic ◽  
Line Shape Function

ON THE TEMPERATURE DEPENDENCE OF PARAMAGNETIC RESONANCE IN THE CASE OF THE ISING MODEL

1961 ◽  
Vol 39 (12) ◽  
pp. 1733-1737 ◽  
Author(s):  
Y. Y. Lee
Keyword(s):  
Ising Model ◽  
Temperature Dependence ◽  
Approximation Method ◽  
Line Shape ◽  
Theoretical Study ◽  
Shape Function ◽  
Paramagnetic Resonance ◽  
One Dimensional ◽  
The One ◽  
Line Shape Function

The adequacy of the approximation method used by McMillan and Opechowski in their theoretical study of the temperature dependence of the paramagnetic resonance line shape function is very difficult to ascertain for the case of a typical paramagnetic crystal. For this reason the approximation method has been investigated for the very simple case of the one-dimensional Ising model. Exact expressions for the line shape function of the model are compared with expressions obtained by the approximation method mentioned above. The agreement between the two expressions is found to be very good in general, and extremely good at very low temperatures.

scholarly journals Laboratory spectral calibration of the TanSat atmospheric carbon dioxide grating spectrometer

2018 ◽  
Vol 7 (3) ◽  
pp. 245-252 ◽  
Author(s):  
Zhongdong Yang ◽  
Yuquan Zhen ◽  
Zenshan Yin ◽  
Chao Lin ◽  
Yanmeng Bi ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Spectral Resolution ◽  
Line Shape ◽  
Atmospheric Carbon Dioxide ◽  
Near Infrared ◽  
Shape Function ◽  
Grating Spectrometer ◽  
Spectral Calibration ◽  
Atmospheric Carbon ◽  
Line Shape Function

Abstract. TanSat is a key satellite mission in the Chinese Earth Observation program and is designed to measure the global atmospheric column-averaged dry-air CO2 mole fraction by measuring the visible and near-infrared solar-reflected spectra. The first Chinese super-high-resolution grating spectrometer for measuring atmospheric CO2 is aboard TanSat. This spectrometer is a suite incorporating three grating spectrometers that make coincident measurements of reflected sunlight in the near-infrared CO2 band near 1.61 and 2.06 µm and in the molecular oxygen (O2) A-band at 0.76 µm. The spectral resolving power (λ∕Δλ) values are ∼19 000, ∼12 800, and ∼12 250 in the O2 A-band, and the weak and strong absorption bands of CO2, respectively. This paper describes the prelaunch spectral calibration of the atmospheric carbon dioxide grating spectrometer aboard TanSat. Several critical aspects of the spectrometer, including the spectral resolution, spectral dispersion, and the instrument line shape function of each channel, which are directly related to producing the Level 1 products are evaluated in this paper. The instrument line shape function of the spectrometer is notably symmetrical and perfectly consistent across all channels in the three bands. The symmetry is better then 99.99 %, and the consistency in the worst case is better then 99.97 %, 99.98 %, and 99.98 % in the O2 A, WCO2, and SCO2 bands, respectively. The resulting variations in the spectral calibrations and the radiometric response errors are negligible. The spectral resolution characterizations meet the mission requirements. The spectral dispersions have excellent consistency in the spatial dimension of each band, and there is good linearity in the spectral dimension of each band. The RMS errors of the fitting residuals are 0.9, 1, and 0.7 pm in the O2 A-band, the WCO2 band, and the SCO2 band, respectively. Taken together, these results suggest that the spectral characterizations of the spectrometer aboard TanSat meet the mission requirements.

NMR Line Shape Function Analysis in Solids

1987 ◽  
Vol 139 (2) ◽  
pp. K137-K140 ◽  
Author(s):  
B. M. Bolotov ◽  
D. A. Aksenov ◽  
A. I. Polyakov ◽  
S. P. Senshin
Keyword(s):  
Line Shape ◽  
Shape Function ◽  
Function Analysis ◽  
Line Shape Function

Effects of temperature on the absorption line-shape function for driven two-level atoms: A non-Markovian treatment

1995 ◽  
Vol 52 (4) ◽  
pp. 2804-2810 ◽  
Author(s):  
J. R. Brinati ◽  
S. S. Mizrahi ◽  
G. A. Prataviera
Keyword(s):  
Absorption Line ◽  
Line Shape ◽  
Shape Function ◽  
Effects Of Temperature ◽  
Line Shape Function ◽  
Absorption Line Shape

Measurements of the spectral line shape function and frequency width of longitudinal mode in a multimode gas laser

1996 ◽  
Vol 68 (14) ◽  
pp. 1907-1909
Author(s):  
Jianping Yin ◽  
Jianxing Fang ◽  
Shiqun Zhu ◽  
Weijian Gao ◽  
Yuzhu Wang
Keyword(s):  
Spectral Line ◽  
Line Shape ◽  
Shape Function ◽  
Longitudinal Mode ◽  
Spectral Line Shape ◽  
Gas Laser ◽  
Line Shape Function

Line-shape function for the microwave-induced hyperfine-level transition in positronium

1984 ◽  
Vol 30 (5) ◽  
pp. 2316-2322
Author(s):  
F. H. M. Faisal ◽  
P. S. Ray
Keyword(s):  
Line Shape ◽  
Shape Function ◽  
Level Transition ◽  
Line Shape Function

The collision-induced first-overtone band of hydrogen at low temperature

1988 ◽  
Vol 66 (2) ◽  
pp. 155-158 ◽  
Author(s):  
A. R. W. McKellar
Keyword(s):  
Absorption Spectrum ◽  
Low Temperature ◽  
Recent Work ◽  
Line Shape ◽  
Shape Function ◽  
Vibrational Band ◽  
Standard Theory ◽  
Induced Absorption ◽  
Overtone Band ◽  
Line Shape Function

The collision-induced absorption spectrum of hydrogen in the region of the first overtone (8000 to 9000 cm−1) has been studied using a long path (110 m) at low temperature (28 K) and three different ortho-H2 – para-H2 ratios. An analysis of the band profiles shows that there is no evidence of an overlap-induced contribution in this region, and that the standard theory of quadrupole-induced absorption overestimates the strength of the single vibrational band (Δν = 2), relative to that of the double vibrational band (Δν = 1 + 1), by a factor of 1.34. The Birnbaum–Cohen line-shape function gives a good fit to the observed spectra, and the parameters appearing in this function are well predicted by the recent work of Borysow et al. (Astrophys. J. 296, 644(1985)).

Line shape function for semiconductor laser modelling

1997 ◽  
Vol 33 (24) ◽  
pp. 2046 ◽  
Author(s):  
P.G. Eliseev
Keyword(s):  
Semiconductor Laser ◽  
Line Shape ◽  
Shape Function ◽  
Line Shape Function

Speed-dependent Voigt dispersion line-shape function: applicable to techniques measuring dispersion signals

2012 ◽  
Vol 29 (10) ◽  
pp. 2971 ◽  
Author(s):  
Junyang Wang ◽  
Patrick Ehlers ◽  
Isak Silander ◽  
Jonas Westberg ◽  
Ove Axner
Keyword(s):  
Line Shape ◽  
Shape Function ◽  
Dispersion Line ◽  
Line Shape Function
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