High-resolution acoustooptic laser spectrometer

1979 ◽  
Vol 30 (6) ◽  
pp. 750-754 ◽  
Author(s):  
A. B. Antipov ◽  
V. A. Kapitanov ◽  
V. P. Lopasov
Keyword(s):  
High Resolution ◽  
Laser Spectrometer

Intensités des raies d'absorption dans la bande chaude ν8 + ν11 − ν11 de l'aliène 12C3H4

1986 ◽  
Vol 64 (3) ◽  
pp. 289-296 ◽  
Author(s):  
M. Dang-Nhu ◽  
A. S. Pine
Keyword(s):  
High Resolution ◽  
Difference Frequency ◽  
Laser Spectrometer ◽  
Intensity Parameters ◽  
Hot Band ◽  
Frequency Laser ◽  
Group D

Strengths of individual lines of the hot band ν8 + ν11 − ν11 of 12C3H4 at 3 μm have been measured with a high-resolution difference-frequency laser spectrometer. Finally, two intensity parameters have been determined using a general formulation written for hot bands E′ × E ← E of group D2d.

scholarly journals High-resolution underwater laser spectrometer sensing provides new insights into methane distribution at an Arctic seepage site

Ocean Science ◽  
2019 ◽  
Vol 15 (4) ◽  
pp. 1055-1069 ◽  
Author(s):  
Pär Jansson ◽  
Jack Triest ◽  
Roberto Grilli ◽  
Bénédicte Ferré ◽  
Anna Silyakova ◽  
...  
Keyword(s):  
High Resolution ◽  
Water Column ◽  
Numerical Models ◽  
Fast Response ◽  
Laser Spectrometer ◽  
Current Standard ◽  
Discrete Sampling ◽  
Mixing Ratios ◽  
Technological Advances ◽  
Ocean Measurements

Abstract. Methane (CH4) in marine sediments has the potential to contribute to changes in the ocean and climate system. Physical and biochemical processes that are difficult to quantify with current standard methods such as acoustic surveys and discrete sampling govern the distribution of dissolved CH4 in oceans and lakes. Detailed observations of aquatic CH4 concentrations are required for a better understanding of CH4 dynamics in the water column, how it can affect lake and ocean acidification, the chemosynthetic ecosystem, and mixing ratios of atmospheric climate gases. Here we present pioneering high-resolution in situ measurements of dissolved CH4 throughout the water column over a 400 m deep CH4 seepage area at the continental slope west of Svalbard. A new fast-response underwater membrane-inlet laser spectrometer sensor demonstrates technological advances and breakthroughs for ocean measurements. We reveal decametre-scale variations in dissolved CH4 concentrations over the CH4 seepage zone. Previous studies could not resolve such heterogeneity in the area, assumed a smoother distribution, and therefore lacked both details on and insights into ongoing processes. We show good repeatability of the instrument measurements, which are also in agreement with discrete sampling. New numerical models, based on acoustically evidenced free gas emissions from the seafloor, support the observed heterogeneity and CH4 inventory. We identified sources of CH4, undetectable with echo sounder, and rapid diffusion of dissolved CH4 away from the sources. Results from the continuous ocean laser-spectrometer measurements, supported by modelling, improve our understanding of CH4 fluxes and related physical processes over Arctic CH4 degassing regions.

scholarly journals Evidence for long-lived polar vortex air in the mid-latitude summer stratosphere from in situ laser diode CH<sub>4</sub> and H<sub>2</sub>O measurements

2005 ◽  
Vol 5 (6) ◽  
pp. 1467-1472 ◽  
Author(s):  
G. Durry ◽  
A. Hauchecorne
Keyword(s):  
High Resolution ◽  
Laser Diode ◽  
Polar Vortex ◽  
The Arctic ◽  
Concentration Profiles ◽  
Spatial Structures ◽  
Laser Spectrometer ◽  
Southern France ◽  
Diode Laser Spectrometer

Abstract. A balloon borne diode laser spectrometer was launched in southern France in June 2000 to yield in situ stratospheric CH4 and H2O measurements. In the altitude region ranging from 20km to 25km, striking large spatial structures were observed in the vertical concentration profiles of both species. We suggest these patterns are due to the presence of long-lived remnants of the wintertime polar vortex in the mid-latitude summer stratosphere. To support this interpretation, a high resolution advection model for potential vorticity is used to investigate the evolution of the Arctic vortex after its breakdown phase in spring 2000.

HHigh Resolution Spectroscopy Using a Stabilized Diode Laser: the 2υ9 Band of HNO3

1988 ◽  
Vol 43 (5) ◽  
pp. 402-406 ◽  
Author(s):  
Thomas Giesen ◽  
M. Harter ◽  
R. Schieder ◽  
G. Winnewisser ◽  
K.M.T. Yamada
Keyword(s):  
High Resolution ◽  
Spectral Data ◽  
Internal Rotation ◽  
Diode Laser ◽  
Tunable Diode Laser ◽  
Fermi Resonance ◽  
High Resolution Spectrum ◽  
Laser Spectrometer ◽  
Diode Laser Spectrometer ◽  
Stabilization Technique

The high resolution spectrum of the 2 υ9 band of HNO3 has been recorded by a tunable diode laser spectrometer with a newly developed frequency stabilization technique. The spectral data were digitally stored and processed by a dedicated micro-computer in order to improve the sensitivity and the precision of the measurements. In addition to the anomalies due to the Fermi resonance with the υ5 = 1 state, we have observed the line doubling caused by the internal rotation of the OH group.

Improved Spectroscopic Constants for 14C16O2 Obtained from the ν3 Band

1989 ◽  
Vol 44 (7) ◽  
pp. 633-639 ◽  
Author(s):  
S. Dobos ◽  
G . Winnewisser ◽  
F. Kling ◽  
J. Mink
Keyword(s):  
High Resolution ◽  
Diode Laser ◽  
Spectral Region ◽  
Tunable Diode Laser ◽  
Spectroscopic Constants ◽  
Laser Spectrometer ◽  
Diode Laser Spectrometer ◽  
Medium Resolution ◽  
Carrier Free ◽  
Ftir Spectrometer

The absorption spectra of carrier free 14C16O2 in the spectral range of 2290-2150 cm−1 by a medium resolution FTIR spectrometer, and the spectral region of 2258 − 2229 cm−1 with a high resolution tunable diode laser spectrometer have been recorded. Spectroscopic constants were calculated from the 0001 − 0000 and 0111 −0110 transitions.

New ultra-high resolution dye laser spectrometer utilizing a non-tunable reference resonator

1987 ◽  
Vol 43 (2) ◽  
pp. 85-91 ◽  
Author(s):  
J. Helmcke ◽  
J. J. Snyder ◽  
A. Morinaga ◽  
F. Mensing ◽  
M. Gl�ser
Keyword(s):  
High Resolution ◽  
Dye Laser ◽  
Laser Spectrometer

High-resolution diode laser spectrometer for Ca1S 0 -3P 1 transition

1995 ◽  
Author(s):  
Takayuki Kurosu ◽  
Jun Ishikawa ◽  
Nobuhiko Ito ◽  
Richard W. Fox
Keyword(s):  
High Resolution ◽  
Diode Laser ◽  
Laser Spectrometer ◽  
Diode Laser Spectrometer
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