Results 211 to 220 of about 26,179 (262)
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INFRARED PLASMA DIAGNOSTICS WITH LASERS
Infrared Physics, 1976Abstract Infrared lasers have rendered possible measurements of plasma parameters in a range not accessible using either optical or microwave techniques. Diagnostic methods based on the refraction and scattering of radiation by free electrons are discussed.
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Laser measurements in the infrared
Physics World, 1996Lasers that operate in the mid-infrared (~1–20 μm) have many applications, ranging from molecular spectroscopy to monitoring pollution in the atmosphere. However, it is difficult to design systems for making accurate measurements of laser power, energy and beam profile in the mid-infrared because several problems arise that do not occur in the visible ...
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Reports on Progress in Physics, 1979
The principles and operating characteristics of several tunable infrared lasers are discussed. These tunable sources include high-pressure molecular gas lasers, nonlinear frequency converters, Raman frequency converters, and solid-state tunable lasers. The sources are compared in terms of their useful linewidth, output power, efficiency and wavelength ...
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The principles and operating characteristics of several tunable infrared lasers are discussed. These tunable sources include high-pressure molecular gas lasers, nonlinear frequency converters, Raman frequency converters, and solid-state tunable lasers. The sources are compared in terms of their useful linewidth, output power, efficiency and wavelength ...
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Applied Scientific Research, 1967
A rangementer, working at 1,06 μ, using neodymium-doped glass rods, is described. By applying a rotating prism (15000 r.p.m.) as a Q-switch a single pulse is emitted. At a pumpenergy of 55 joules the peakpower is 1 Megawatt and the risetime is 20 nanoseconds. It is shown that the peakvalue of the noise is most important.
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A rangementer, working at 1,06 μ, using neodymium-doped glass rods, is described. By applying a rotating prism (15000 r.p.m.) as a Q-switch a single pulse is emitted. At a pumpenergy of 55 joules the peakpower is 1 Megawatt and the risetime is 20 nanoseconds. It is shown that the peakvalue of the noise is most important.
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AIP Conference Proceedings, 1981
This paper reviews the development of infrared diode lasers for automobile exhaust gas analysis and high resolution spectroscopy at the General Motors Research Laboratories. Advances in lead‐salt crystal growth technology and laser fabrication techniques to achieve high temperature operation and wide frequency tuning range will be discussed.
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This paper reviews the development of infrared diode lasers for automobile exhaust gas analysis and high resolution spectroscopy at the General Motors Research Laboratories. Advances in lead‐salt crystal growth technology and laser fabrication techniques to achieve high temperature operation and wide frequency tuning range will be discussed.
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Soviet Journal of Quantum Electronics, 1977
A description is given of an infrared laser defectograph (flaw detector) based on the use of improved temperature sensitive luminescent screens which make visible the CO2 infrared laser radiation transmitted by an investigated object. This defectograph can be used to study the internal structure and microdefects in semiconducting materials which are ...
Evgenii A Vinogradov +8 more
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A description is given of an infrared laser defectograph (flaw detector) based on the use of improved temperature sensitive luminescent screens which make visible the CO2 infrared laser radiation transmitted by an investigated object. This defectograph can be used to study the internal structure and microdefects in semiconducting materials which are ...
Evgenii A Vinogradov +8 more
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1980
In the article we shall discuss a new type of photochemistry which involves infrared photons instead of visible or UV photons, and which occurs by vibrational excitation rather than electronic transitions. It has been firmly established during the past few years that polyatomic molecules can absorb sufficient energy from an infrared laser pulse that a ...
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In the article we shall discuss a new type of photochemistry which involves infrared photons instead of visible or UV photons, and which occurs by vibrational excitation rather than electronic transitions. It has been firmly established during the past few years that polyatomic molecules can absorb sufficient energy from an infrared laser pulse that a ...
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SPIE Proceedings, 1988
Over the last 20 years there has been considerable research and development of infrared laser sources. This interest stems from the presence of two low attenuation windows in the atmosphere between 3-5μ,m and 8-14μ.m, on the basis of which, a wide range of military, industrial and medical applications have been proposed.
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Over the last 20 years there has been considerable research and development of infrared laser sources. This interest stems from the presence of two low attenuation windows in the atmosphere between 3-5μ,m and 8-14μ.m, on the basis of which, a wide range of military, industrial and medical applications have been proposed.
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Optical Engineering, 1974
Tunable infrared lasers have been used in research laboratories for ultrahigh resolution spectroscopy measurements of molecular gases. While these lasers offer the potential for greatly improving instrument (e.g., laser spectrometer) performance, implementation of the instrument function is complicated by the nature of the laser source.
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Tunable infrared lasers have been used in research laboratories for ultrahigh resolution spectroscopy measurements of molecular gases. While these lasers offer the potential for greatly improving instrument (e.g., laser spectrometer) performance, implementation of the instrument function is complicated by the nature of the laser source.
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Infrared Lasers for Spectroscopy
1988A survey of various IR-lasers is contained in the first chapter. Short explanations of the underlying mechanisms for both continuously tunable and stepwise tunable lasers suitable for high resolution spectroscopy are given.
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