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.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this paper, a hole of 40µ diameter through a diamond plate 0-5 mm thick cut parallel to the (110) plane was shown, where a plano-convex lens of 17 mm focal length was used to create a triangular depression in this surface.
Abstract: AN observation of laser-induced damage in clear diamond has recently been reported1 and the conclusions there drawn are that damage occurred on the exit face only and that small holes cannot be drilled because of damage by acoustic phonons. This is contrary to our experience. Using a ruby laser operating in relaxation oscillations with an output of only 0.2 joule and a beam divergence of 3 milliradians, we can produce a hole with two laser shots. Fig. 1 shows such a hole of 40µ diameter through a diamond plate 0-5 mm thick cut parallel to the (110) plane. The laser beam was focused on to the front (110) surface by a plano-convex lens of 17 mm focal length, creating a triangular depression in this surface. Blackening of the walls of the hole also occurred, probably due to graphitization. This diamond plate had also been hit by the same laser operating with a rotating prism Q-switch to give a 5 MW pulse, beam divergence 1 milliradian, focused by an 8-mm microscope objective. Under these conditions blackening and damage occurred on the exit surface only and can be seen on the right of Fig. 1. The microscope objective was wrecked in the process.
7 citations
01 Nov 1992
TL;DR: In this article, a multi-frame image converter camera with a laser illuminator was developed to produce sequential photographs of fast phenomena with very high resolution, including the initial formation and early time history of high velocity shaped charge jets.
Abstract: By combining the attributes of electro-optic shuttering and pulsed laser illumination in a large format camera system, we have developed a multi-frame image converter camera with a laser illuminator that produces sequential photographs of fast phenomena with very high resolution. The combination of the large size image plane (75 mm), short exposure time per frame (minimum 12 - 15 ns), and monochromatic laser illumination provides clear, sharp, front-lit images of surfaces and shapes with no degradation by luminous air shocks or motion blur. The unique modular design of the camera and the laser allow for a variety of configurations and applications. The current camera system produces eight independent pictures or four stereo pairs. A Q-switched ruby laser with multiple pulse capability provides individual illumination for each frame. This system has photographed a variety of fast phenomena including the first stereo sequential photographs of the initial formation and early time history of high velocity shaped-charge jets.
7 citations
TL;DR: Raman scattering and point contact current-voltage (PCIV) measurements were used as characterization tools of tin-diffused GaAs layers in this paper, where the diffusion was induced by irradiating GaAs substrates covered with thin tin layers single pulses of a ruby laser.
Abstract: Raman scattering and point contact current-voltage (PCIV) measurements were used as characterization tools of tin-diffused GaAs layers. Diffusion was induced by irradiating GaAs substrates covered with thin tin layers single pulses of a ruby laser. Samples processed with the lowest energies show strong damage and incomplete electrical activation as deduced from Raman and PCIV measurements, respectively. Raman microprobe in depth analysis and PCIV profiles also suggest the presence of a damaged region with incomplete electrical activation at the boundary between the molten layer and the solid substrate.
7 citations
TL;DR: In this paper, the optical mixing process in which two incident light beams with frequencies ω 1 and ω 2 produce light of frequency 2ω 1 -ω 2 through the third order nonlinear polarization in the electric field, has been experimentally studied in crystalline quartz.
Abstract: The optical mixing process, in which two incident light beams with frequencies ω 1 and ω 2 produce light of frequency 2ω 1 -ω 2 through the third order nonlinear polarization in the electric field, has been experimentally studied in crystalline quartz. A ruby laser, a Nd glass laser and several liquid Raman lasers were used as light sources. Making use of the symmetry properties of the nonlinear susceptibilities, it was confirmed that the observed phenomenon is not the combined effect of two processes due to the second order nonlinear polarization in the electric field. The dispersive property of the associated nonlinear susceptibility χ 3 was measured as a function of ω 1 -ω 2 . The value of χ 3 showed no appreciable change in the frequency range (ω 1 -ω 2 )-ω v =100∼4000 cm -1 where ω v is the typical lattice vibrational frequency. The results are discussed in connection with the energy level structure of quartz.
7 citations
TL;DR: A new case of multiple facial fireworks tattooing managed successfully with a Q-switched ruby laser under low fluency pulses at 4.5 J/cm2 and more than 75% of the lesions were removed without scarring.
Abstract: Background. The best approach in managing patients with explosive traumatic tattoos is the immediate removal of particles during initial care. Delayed treatment makes the situation more difficult to manage. Under certain conditions, a Q-switched ruby laser can be considered an excellent alternative.
Methods. We report a new case of multiple facial fireworks tattooing managed successfully with a Q-switched ruby laser under low fluency pulses at 4.5 J/cm2. A pretreatment test zone was initially performed, and then three treatments were conducted at 6-week intervals.
Results. More than 75% of the lesions were removed without scarring.
Conclusion. The Q-switched ruby laser can be a safe and excellent choice for the removal of explosive particles.
7 citations