Topic
Ruby laser
About: Ruby laser is a research topic. Over the lifetime, 2474 publications have been published within this topic receiving 38933 citations. The topic is also known as: corundum laser & ruby rod.
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TL;DR: In premixed laminar methane–air flames time- and space-resolved oxygen concentration and temperature measurements have been performing using a Q-switched ruby laser Raman probe, good agreement was found with comparative suction probe concentration measurements and with additionally performed optical temperature measurements.
Abstract: In premixed laminar methane–air flames time- and space-resolved oxygen concentration and temperature measurements have been performing using a Q-switched ruby laser Raman probe. Concentration and temperature have been evaluated from selected intensities of the Raman Stokes vibrational Q-branch. Good agreement was found with comparative suction probe concentration measurements and with additionally performed optical (Rayleigh, cw laser Raman) temperature measurements. For fuel-lean flames with various equivalence ratios the pulsed laser Raman probe could be used for controlling stoichiometric flame conditions. Selecting three different narrowband interference filters appropriately, a simultaneous determination of vibrational and rotational temperatures seems possible.
9 citations
9 citations
TL;DR: In this article, the spectral character of the giant pulse emitted by a ruby laser has been investigated to determine the suitability of this source for plasma light scattering experiments, and a Trion LS-4: laser was modified to produce giant pulses by the addition of a Kerr cell, a Nicol prism and a 48 per cent reflectivity dielectric mirror acting as external reflector.
Abstract: THE spectral character of the giant pulse1 emitted by a ruby laser has been investigated to determine the suitability of this source for plasma light scattering experiments. A ‘Trion LS-4: laser’ system consisting of a 10 cm × 1.3 cm × 1.3 cm total internal reflexion ruby with 90° c-axis orientation, pumped by means of a 10,000 joule spiral xenon flash-lamp, has been modified to produce giant pulses by the addition of a Kerr cell, a Nicol prism, and a 48 per cent reflectivity dielectric mirror acting as external reflector. Giant pulses which last for less than 40 n sec were produced by switching the Kerr cell with a low inductance thyratron circuit. The Kerr cell was normally gated open for 1 µsec. Throughout the experiment the pumping energy delivered to the flash-lamp was maintained at 6,700±300 joules, which is about 25 per cent above threshold for normal relaxation oscillations in this crystal at the temperature at which it was operated, namely 126±3° K. High-resolution spectroscopy of these pulses was carried out with a variable gap silvered Fabry–Perot interferometer which had a resolving limit of 0.011 cm−1 for 1 cm separation of the mirrors. To ensure that only giant pulse light was recorded, a Barr and Stroud framing camera operated at a speed of 10 µsec per frame was used to photograph the interference fringes on Gaevert infra-red sensitive film (‘Scientia 52A86’).
9 citations
01 Jul 1963
9 citations
TL;DR: In this article, metal silicide layers on single-crystal silicon substrates were irradiated by neodymium or ruby laser pulses; surface melting was monitored by time-resolved reflectivity measurements and the final sample structures were investigated by Rutherford backscattering spectrometry, transmission electron microscopy and X-ray diffraction.
9 citations