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 work, a variety of cell types were irradiated with power density at this wave-length in the range of 0.05–100 MW/cm2 to observe their response and confirmed the observations by Bessis et al.3 that erythrocytes were destroyed by ruby laser radiation while unstained leucocytes were not affected.
Abstract: THE availability of high-power, coherent radiation at new wave-lengths, by means of non-linear optics, has made possible new experiments in the field of radiation effects on cells in tissue culture. It has been shown1,2, by exposure of melanin granules to ruby radiation at 6943 A and its harmonic at 3471 A, that injury sustained by cells in tissue culture is strongly dependent on wave-length. This confirmed the observations by Bessis et al.3 that erythrocytes were destroyed by ruby laser radiation while unstained leucocytes were not affected. Because particular cellular constituents such as pigment granules, haemoglobin and reduced cytochromes b and c show absorption at 5300 A, there was great interest in exploring the radiation effects from the second harmonic output at 5300 A of neodymium (Nd) Q-switched lasers. In the work reported here, a variety of cell types were irradiated with power density at this wave-length in the range of 0.05–100 MW/cm2 to observe their response.
22 citations
TL;DR: In this paper, a 9MW ruby laser beam was used to produce optical parametric noise in a centrosymmetric medium, water, by a phase matched four-photon process.
Abstract: Optical parametric noise has been produced in a centrosymmetric medium, water, by a 9‐MW ruby laser beam. The wavelengths, in the visible, and the angles of emission agree with the tuning curve calculated for a phase‐matched four‐photon process. A power of ≈½μW emitted into a 38‐A band is observed in the low‐loss wavelength range, in approximate agreement with theory. Very strong idler absorption has little apparent effect on the signal power or bandwidth.
22 citations
TL;DR: Chorioretinal lesions have been prodluced in monkeys during experitments with ruby and neodlymium lasers to show that the neural portions of the retina absorb more of damage than the pigment epithelium and adjacent tissues.
Abstract: Chorioretinal lesions hiave been prodluced in monkeys during experitments with ruby and neodlymium lasers. Most of the energy from the ruby laser (wavelength 6943 angstroms) is absorbed by the pigment epithelium, where the greatest damage appears. With the neodymium laser (10,600 angstroms) the neural portions of the retina absorb more of damage than the pigment epithelium and adjacent tissues.
21 citations
TL;DR: An electromagnetic acoustic transducer and acoustic lens have been constructed to provide reproducible and well characterized acoustic shock waves in water and the peak pressure amplitude variation for the unfocused and focused shock waves was found to be within +/- 5%.
Abstract: An electromagnetic acoustic transducer (EMAT) and acoustic lens have been constructed to provide reproducible and well characterized acoustic shock waves in water. The peak pressure amplitude variation for the unfocused and focused shock waves was found to be within +or-5%. The focal region has been characterized both optically and by conventional piezoelectric pressure measurements. Optical investigations centre around ruby laser illuminated Schlieren and focused shadow imaging. The temporal resolution of the optical technique was determined by the ruby laser pulse length of 20 ns, giving a spatial resolution of 30 mu m for a shock front in water.
21 citations
TL;DR: In this article, the time dependence of the second-harmonic generation of a mode-locked Q-switched Nd: YAG laser in reflection from both amorphous and crystalline GaAs surfaces during the pulsed-laser annealing under ruby laser irradiation was investigated.
21 citations