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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01 Jan 2000
TL;DR: A successful ruby laser-removal of laser-induced blackened cosmetic tattoos for acne scar camouflage is reported, which contrasts with other published cases where laser-darkened pigment had to be removed by other measures, or was permanent.
Abstract: Cosmetic tattoos are becoming increasingly popular. Elimination of cosmetic tattoos is sought because of misplacement or migration of tattoo pigment, allergic reactions to the various pigments or dissatisfaction of the customer for various reasons. Removal of unwanted pigment is a domain of laser surgery using various Q-switched laser systems, such as the ruby, alexandrite, pulsed dye and Nd:YAG lasers. Dark colours are easily removed by these lasers, whereas red, pink and skin-toned pigment may turn black if exposed to Q-switched laser light. This ink-blackening occurs because Q-switched lasers heat up the pigments, which consist of ferric oxide, and reduce them into ferrous oxide, which is black. Laser-induced black ink is not always readily removed. A successful ruby laser-removal of laser-induced blackened cosmetic tattoos for acne scar camouflage is reported. The advantageous outcome in this case contrasts with other published cases where laser-darkened pigment had to be removed by other measures, or was permanent. Test site treatment can limit the problem to some degree but, in addition to test-treating, some kind of 'tattoo identification card' could help to prevent problems in this field and allow 'in vitro' test treatment.
10 citations
TL;DR: Spectra from plasmas produced by focusing the output of a Q-switched ruby laser onto planar targets of metallic strontium have been photographed in the 40-500 AA region as mentioned in this paper.
Abstract: Spectra from plasmas produced by focusing the output of a Q-switched ruby laser onto planar targets of metallic strontium have been photographed in the 40-500 AA region. Lines arising from 4p-5s transitions in Sr VI and Sr VII have been identified. From the line profiles it is possible to estimate the mean kinetic energy of these particular ionic species in the plasma.
10 citations
TL;DR: In this paper, the width of a transform-limited pulse obtained at the beginning of the train was 28±2 picoseconds, and at a high output level, rapid deformation arises closer to the peak of a train, resulting in splitting of the pulses into several fragments.
10 citations
TL;DR: In this article, the authors investigated the properties of the 200 MW giant pulse ruby laser irradiation on the lithium plate with and without the existence of the uniform magnetic field, its density, temperature, pressure, velocity of the motion and the electric field due to charge separation.
Abstract: The properties of plasma created by the 200 MW giant pulse ruby laser irradiation on the lithium plate were investigated. Measurements of the variation of the shape and size of the plasma blob with and without the existence of the uniform magnetic field, its density, temperature, pressure, velocity of the motion and the electric field due to the charge separation were made. The phenomena occurring at the head-on collision of two blobs across the uniform magnetic field were also investigated and confirmed that the electric field could be canceled out at the colliding region.
10 citations
TL;DR: In this article, a Q-switched ruby laser with high spatial and time coherence was developed for a pulsed lamp discharge, which can be used to produce transverse axial interference holograms.
9 citations