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 paper, a model-locked ruby laser and a one-cell arrangement were used to detect two-component mixtures by inverse Raman scattering and best results were obtained using a model locked ruby laser.
7 citations
TL;DR: In this paper, a simulated infrared (IR) emission from a condensed dielectric medium under exposure to a giant pulse of a ruby laser was reported, where the angle of divergence of IR radiation was found to be 10−2 rad, while the conversion efficiency with respect to the pumping intensity depended on the type of molecular liquid.
Abstract: Stimulated infrared (IR) emission from a condensed dielectric medium under exposure to a giant pulse of a ruby laser is reported. This effect was predicted in the theoretical paper [1]. Experimental studies were carried out for a number of molecular liquids in two experimental geometries. In the first case (“in transmission” geometry) the propagation direction of the detected IR radiation coincided with that of the exciting radiation. In the second case IR radiation generated was detected in the opposite direction. The angle of divergence of IR radiation was found to be of 10−2 rad, while the conversion efficiency with respect to the pumping intensity depended on the type of molecular liquid and varied in the range of 0.05–0.6%. Possible microscopic mechanisms of generation of IR radiation under pumping of the dielectric medium with visible or ultraviolet (UV) radiation are analyzed.
7 citations
TL;DR: To establish the greater penetration depth of vascular injury using a dye‐enhanced laser technique, a number of patients had incomplete clearance because the depth of penetration by the pulsed dye laser was inadequate.
Abstract: Background and Objective
Although pulsed dye laser has been successfully used in the treatment of portwine stains, a number of patients had incomplete clearance because the depth of penetration by the pulsed dye laser was inadequate. This study was performed to establish the greater penetration depth of vascular injury using a dye-enhanced laser technique.
Study Design/Materials and Methods
The ruby laser at 694.3 nm was used, and the corresponding specific dye was Prussian blue solution (maximum absorbance 694 nm). We compared the penetration depth of vascular injury by the ruby laser irradiation after the Prussian blue injection with that by the dye laser irradiation. A flashlamp dye laser with a pulse duration of 300 μsec and a 5 mm diameter spot size was used to 6.2 J/cm2 at 590 nm. The Prussian blue solution was injected into the superficial epigastric artery of white male Japanese rabbits, immediately followed by the ruby laser exposure to 6.2 J/cm2 at a pulse duration of 283 μsec in a 15 × 15mm spotsize. Depth of penetration was measured from the dermoepidermal junction to the deepest site of vascular injury at 24 hours after laser exposure.
Results
Mean penetration of 590 nm of the dye laser light was 1.45 mm; mean penetration of the 694.3 nm ruby laser irradiation after the Prussian blue injection was 2.33 mm. Ruby laser penetration was greater than that of the dye laser.
Conclusion
This study emphasizes that the ruby laser irradiation after the Prussian blue injection can induce deeper vascular injury than the dye laser inducing similar pathological changes. © 1996 Wiley-Liss, Inc.
7 citations
TL;DR: In this article, the effect of high power laser (Q-switched Ruby laser, 694 nm, 30 ns) irradiation on the critical current density and magnetic hysteresis at 77K and temperature variation of microwave induced d.c. voltage on SmBa2Cu3O676 xcffff ceramic samples have been performed.
Abstract: Studies of the effect of high power laser (Q-switched Ruby laser, 694 nm, 30 ns) irradiation on the critical current density (J
c
) and magnetic hysteresis at 77K and temperature variation of microwave induced d.c. voltage on SmBa2Cu3O
x
ceramic samples have been performed. Irradiation did not substantially changeT
c
but caused a strong increase inJ
c
and magnetic hysteresis at 77K. The microwave-induced d.c. voltage at 77K showed appreciable decrease after irradiation. SEM studies showed grain growth due to sintering which improves the interconnectivity among the superconducting grains. These are attributed to physical densification and consequent reduction in the number of weak links. The increase of magnetic hysteresis after laser irradiation is presumably connected with the creation of defects which act as pinning centres. Thermal modelling suggests that on irradiation the surface melts up to a depth of 1µ and laser-induced evaporation occurs at energy density of 2·5 J/cm2.
7 citations
TL;DR: The optical cavity of the oscillator section of a giant-pulse ruby laser has been split, by means of a pair of prisms, into two parts which can be Q-switched independently as discussed by the authors.
Abstract: The optical cavity of the oscillator section of a giant-pulse ruby laser has been split, by means of a pair of prisms, into two parts which can be Q-switched independently. The laser generates two equal multi-megawatt giant pulses during a single operating cycle, and the relative delay between two is continuously variable over several hundred microseconds.
7 citations