Results 221 to 230 of about 26,111 (260)
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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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IEEE Journal of Quantum Electronics, 1968
CW laser emission, attributed to electronic transitions in the iodine atom, has been obtained at 8 wavelengths between 3.0 and 9.0 μ. The strongest CW lines are at 3.429 and 4.852 μ. One of the weaker CW lines, 5.497 μ, becomes relatively strong when the laser is operated in a pulsed mode. The laser self-pulses under certain operating conditions.
null Hongsuk Kim +3 more
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CW laser emission, attributed to electronic transitions in the iodine atom, has been obtained at 8 wavelengths between 3.0 and 9.0 μ. The strongest CW lines are at 3.429 and 4.852 μ. One of the weaker CW lines, 5.497 μ, becomes relatively strong when the laser is operated in a pulsed mode. The laser self-pulses under certain operating conditions.
null Hongsuk Kim +3 more
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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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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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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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1990
Infrared spectroscopy (in the wavenumber range 300 to 4000 cm-1) is a time honoured technique, having been in active use for more than 100 years1. In this period, an enormous number of molecules have been studied and characterized (it is estimated at more than 104) and low resolution spectra have been widely used by chemists for analytical purposes ...
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Infrared spectroscopy (in the wavenumber range 300 to 4000 cm-1) is a time honoured technique, having been in active use for more than 100 years1. In this period, an enormous number of molecules have been studied and characterized (it is estimated at more than 104) and low resolution spectra have been widely used by chemists for analytical purposes ...
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Infrared Laser Stereolithography
2011Infrared laser stereolithography is a new process of stereolithography, substantially different from those already existents; that uses an infrared laser (carbon dioxide laser) to localize the curing reaction of a thermo-sensitive materials building the desired three-dimensional (3D) shape.
André Luiz Jardini Munhoz +1 more
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Advances in Mid-Infrared Fiber Lasers
2008The current state of the art in mid-infrared fiber laser research is reviewed. The relevant glass and ceramic fiber host matkrials and the fiber, pump, and resonator geometries are introduced. Lasers operating on transitions ranging from 1.9 to 4 pm occurring in the rare-earth-ions $Tm^{3+}$, $HO^{3+}$,$Er^{3+}$ and $Dy^{3+}$ and their population ...
Pollnau, Markus, Jackson, S.D.
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Infrared Atmospheric Transmission of Laser Radiation
Applied Optics, 1974Calculations have been made of the monochromatic transmission of HF, HCI, HBr, and DF laser radiations between 2400 cm(-1) and 3500 cm(-1) for nonhomogeneous atmospheric slant paths. Aerosol extinction, continuum molecular absorption, and line absorption are included in the computations.
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Intense infrared lasers for strong-field science
Advances in Optics and Photonics, 2022Zenghu Chang +2 more
exaly