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 this article, a two-dimensional model of the energy distribution of a ruby laser rod was shown to change from a central disc at low chromium concentrations to an annular ring, at about half the radius of the rod, for rods that are about 1 cm in diameter and 0.05% chromium concentration.
Abstract: The pumping energy distribution across a ruby laser rod is one of the factors which may control the dominant mode of propagation through the laser assembly. The energy distribution is controlled by the focusing action of the rod and the absorption coefficient of the material. Experimental results are presented for a two-dimensional model, in which the energy distribution is shown to change from a central disc at low chromium concentrations to an annular ring, at about half the radius of the rod, for ruby rods that are about 1 cm in diameter and 0.05% chromium concentration. The results are in qualitative agreement with theory.
25 citations
Patent•
04 Oct 1985
TL;DR: In this paper, a train of light pulses are focussed by optics onto a workpiece and a computer operates the laser to drill a small pilot hole in the workpiece using a group of varying pulses.
Abstract: Apparatus and a method for drilling precision holes in a variety of materials. The apparatus uses a ruby laser to produce a train of light pulses which are focussed by optics onto a workpiece. Each of the pulse in the train can be controlled in peak energy, duration and shape independently from the other pulses in the train and the spot size and shape of each pulse at the workpiece can also be independently controlled. In accordance with the method, a computer operates the laser to drill a small pilot hole in the workpiece using a group of varying pulses. The pilot hole is then widened and reamed with the laser to the final size. On multilayer workpieces, multiple pulses with different pulse width, energy and spatial shape are used at each stage of the hole to prevent workpiece damage, yet allow drilling at reasonable speeds.
25 citations
TL;DR: In this article, the intrinsic bulk damage in nine alkali-halide crystals was reported, and for all of these crystals the damage field was greater than or equal to that measured at 1.06 μm and dc.
Abstract: Ruby‐laser‐induced intrinsic bulk damage in nine alkali‐halide crystals is reported. Within experimental error and for all of these crystals the damage field is greater than or equal to that measured at 1.06 μm and dc. The trend in breakdown fields among these crystals at 0.69 μm differs from that at longer wavelengths and suggests that, even though electron avalanche breakdown is the likely damage mechanism, the first signs of a frequency dependence to this process appear by 4.3×1014 Hz.
25 citations
TL;DR: In this paper, the photoelectric and electrical properties of high resistivity p-like CdTe and Cd 0.96 Zn 0.04 Te single crystals and barrier structures on their base before and after laser irradiation in different conditions are studied.
25 citations
TL;DR: In this article, the light intensity variations across the partially transmitting face of a laser crystal operated near threshold are reported. And the intensity variation patterns are suggestive of the modes of a cylindrical microwave cavity and are closely related to the transverse modes of the optical resonator.
Abstract: Observations of the light intensity variations across the partially transmitting face of a laser crystal operated near threshold are reported. The intensity variation patterns are suggestive of the modes of a cylindrical microwave cavity and are believed to be closely related to the transverse modes of the optical resonator. Preliminary polarization studies indicated that patterns with only a twofold symmetry axis are linearly polarized, whereas others are unpolarized. The pattern sizes range between approximately 170 and 850 μ. The divergence of the emerging beam (several milliradians) decreased with increasing resonator length. Fabry-Perot analysis showed only one excited longitudinal mode for a 1-cm long resonator, but the number increased with the resonator length.
25 citations