Diode laser spectroscopic measurements and theoretical calculations of line parameters of nitrogen-broadened water vapor overtone transitions in the 818–834nm wavelength region

2007 ◽  
Vol 242 (1) ◽  
pp. 10-16 ◽  
Author(s):  
Amitava Bandyopadhyay ◽  
Biswajit Ray ◽  
Pradip N. Ghosh ◽  
Danielle L. Niles ◽  
Robert R. Gamache
Keyword(s):  
Water Vapor ◽  
Diode Laser ◽  
Theoretical Calculations ◽  
Wavelength Region ◽  
Spectroscopic Measurements ◽  
Laser Spectroscopic

Diode-laser based diagnostic to monitor water-vapor in high-pressure environments

1999 ◽  
Author(s):  
V. Nagali ◽  
J. Herbon ◽  
D. Horning ◽  
R. Bates ◽  
D. Davidson ◽  
...  
Keyword(s):  
High Pressure ◽  
Water Vapor ◽  
Diode Laser

Diode laser spectroscopic study of the O2 A-band line shape perturbed by N2

1997 ◽  
Vol 407 (1) ◽  
pp. 39-46 ◽  
Author(s):  
Biswajit Ray ◽  
Debasish Biswas ◽  
Pradip N Ghosh
Keyword(s):  
Spectroscopic Study ◽  
Diode Laser ◽  
Line Shape ◽  
Laser Spectroscopic

A New Magnetooptical Effect Discovered on Magnetic Multilayers: The Magnetorefractive Effect

1995 ◽  
Vol 384 ◽  
Author(s):  
J. C. Jacquet ◽  
T. Valet
Keyword(s):  
Magnetic Field ◽  
Optical Transmission ◽  
Theoretical Calculations ◽  
Wavelength Region ◽  
Magnetic Multilayers ◽  
Light Wavelength ◽  
Metallic Multilayers ◽  
Magnetooptical Effect ◽  
Transmission Measurements ◽  
Magnetorefractive Effect

ABSTRACTWe show theoretically that the change in the magnetization structure of magnetic metallic multilayers under the application of a magnetic field shall be generally associated with a significant change of the refractive index. This constitutes a new magnetooptical effect: the magnetorefractive effect.Optical transmission measurements under an applied magnetic field through [Ni80Fe20/Cu/Co/Cu] multilayers, in the light wavelength region between 2 μm and 20 μm, clearly demonstrate the existence of the predicted effect and are found in reasonnable agreement with the theoretical calculations.

Evaluation of tunable diode laser absorption spectroscopy for in‐process water vapor mass flux measurements during freeze drying

2007 ◽  
Vol 96 (7) ◽  
pp. 1776-1793 ◽  
Author(s):  
Henning Gieseler ◽  
William J. Kessler ◽  
Michael Finson ◽  
Steven J. Davis ◽  
Phillip A. Mulhall ◽  
...  
Keyword(s):  
Water Vapor ◽  
Diode Laser ◽  
Absorption Spectroscopy ◽  
Mass Flux ◽  
Freeze Drying ◽  
Tunable Diode Laser ◽  
Laser Absorption ◽  
Flux Measurements ◽  
Diode Laser Absorption ◽  
Vapor Mass

scholarly journals Field-deployable diode-laser-based differential absorption lidar (DIAL) for profiling water vapor

2015 ◽  
Vol 8 (3) ◽  
pp. 1073-1087 ◽  
Author(s):  
S. M. Spuler ◽  
K. S. Repasky ◽  
B. Morley ◽  
D. Moen ◽  
M. Hayman ◽  
...  
Keyword(s):  
Water Vapor ◽  
Diode Laser ◽  
Temporal Resolution ◽  
Filter Design ◽  
Wide Field ◽  
Atmospheric Conditions ◽  
Differential Absorption ◽  
Differential Absorption Lidar ◽  
Atmospheric Sciences ◽  
Range Resolution

Abstract. A field-deployable water vapor profiling instrument that builds on the foundation of the preceding generations of diode-laser-based differential absorption lidar (DIAL) laboratory prototypes was constructed and tested. Significant advances are discussed, including a unique shared telescope design that allows expansion of the outgoing beam for eye-safe operation with optomechanical and thermal stability; multistage optical filtering enabling measurement during daytime bright-cloud conditions; rapid spectral switching between the online and offline wavelengths enabling measurements during changing atmospheric conditions; and enhanced performance at lower ranges by the introduction of a new filter design and the addition of a wide field-of-view channel. Performance modeling, testing, and intercomparisons are performed and discussed. In general, the instrument has a 150 m range resolution with a 10 min temporal resolution; 1 min temporal resolution in the lowest 2 km of the atmosphere is demonstrated. The instrument is shown capable of autonomous long-term field operation – 50 days with a > 95% uptime – under a broad set of atmospheric conditions and potentially forms the basis for a ground-based network of eye-safe autonomous instruments needed for the atmospheric sciences research and forecasting communities.

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