Results 271 to 280 of about 3,062,797 (334)
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Infrared laser writing of MOFs
Chemical Communications, 2017By a computer-controlled infrared laser machine, any types of metal–organic frameworks can be patterned on substrates.
K. Hirai, K. Sada
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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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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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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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Infrared Physics, 1976
Abstract Two far i.r. lines from a pulsed helium laser have been accurately measured with a metal grid Fabry-Perot interferometer at wavelengths of 95.763 ± 0.006 μm and 216.12 ± 0.01μm. The laser output critically depends on the plasma conditions in the laser during the excitation phase.
R. TURNER, R.A. MURPHY
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Abstract Two far i.r. lines from a pulsed helium laser have been accurately measured with a metal grid Fabry-Perot interferometer at wavelengths of 95.763 ± 0.006 μm and 216.12 ± 0.01μm. The laser output critically depends on the plasma conditions in the laser during the excitation phase.
R. TURNER, R.A. MURPHY
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Near Infrared Laser Ocular Bioeffects
Health Physics, 1989Thresholds for laser chorioretinal injury in the red end of the visible spectrum and the near-infrared (IR-A) spectral regions are presented. An unpredicted wavelength dependence of the injury threshold for single Q-switched pulses is demonstrated. Four lasers were used to determine thresholds at 40 wavelengths between 532 nm and 1064 nm: a ruby laser,
D J, Lund, E S, Beatrice
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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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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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Far-infrared CH_3F Stark laser
Optics Letters, 1979A rectangular metal–dielectric far-infrared waveguide laser has been operated on the individual Stark components of CH3F by the application an electric field across the laser medium. The results agree well with theoretical predictions.
INGUSCIO, MASSIMO +5 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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