منابع مشابه
Tunable Far Infrared Laser Spectroscopy
using C02 laser difference generation in metal-insulator-metal diodes either from the difference between a fixed frequency C02 laser and a tunable waveguide laser, or from the difference between two fixed frequency C02 lasers plus microwave sidebands. is being used to make highly accurate FIR frequency measurements of stable species to serve as frequency and wavelength calibration standards; to...
متن کاملFar infrared airborne spectroscopy.
Equipment and techniques employed in an airborne far ir (80-400 micro) spectral measurement of the solar brightness temperature are described, with particular attention paid to the scanning Michelson interferometer and the radiometric calibration. The airborne performance of several telescopic guiding systems, a liquid helium cooled bolometer, and golay cells are discussed, summarizing experien...
متن کاملInstrumentation for Far-infrared Spectroscopy
Measurements of far-infrared spectra are made far more difficult than the corresponding measurement of midor near-infrared spectra because of the weakness of the source. The spectral energy density of a blackbody at 1400 K is almost 5800 times weaker at 10 cm 1, and about 60 times weaker at 100 cm 1, than it is at 1000 cm 1. Since the sensitivity of any measurement of a midor far-infrared spect...
متن کاملFar-infrared CH3F Stark laser.
This Letter reports oscillation of a far-infrared (FIR) waveguide laser on individual Stark components of the 496-,Am transition in CH3 F by the application of an electric field across the laser medium. Stark shifting of vibrational-rotational absorption lines into coincidence with C02-laser pump lines giving rise to FIR oscillation in the rotational transitions was first observed in ammonia.' ...
متن کاملFar Infrared Laser Magnetic Resonance
Within the last few years, laser magnetic resonance (LMR) has emerged as a powerful technique for the detection of transient species in the gas phase and the study of their rotational spectra. The sensitivity of this method is con siderably higher than those of most competing techniques, such as conventional optical and microwave spectroscopy and gas-phase EPR, while the resolution attainable ...
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ژورنال
عنوان ژورنال: Le Journal de Physique IV
سال: 1991
ISSN: 1155-4339
DOI: 10.1051/jp4:19917145