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, an experimental arrangement for the measurement of elastic material constants from specimens of circular or rectangular rods is presented, using very short stress pulses produced by laser energy absorption from a Q•switched ruby laser.
Abstract: A convenient experimental arrangement for the measurement of elastic material constants from specimens of circular or rectangular rods is presented. An ultrasonic pulse technique is applied using very short stress pulses produced by laser energy absorption from a Q‐switched ruby laser.
17 citations
TL;DR: In this paper, the authors used two beams from a ruby laser inclined at an angle to each other to form a temporary grating on the surface of germanium, which appeared to be present only during the illumination and no visible damage was observed.
Abstract: Diffraction gratings have been formed on the surface of germanium using two beams from a ruby laser inclined at an angle to each other. Grating spacings from 2 to 20 μm have been formed that appear to be present only during the illumination and no visible damage is observed. Subsequent illumination with a single beam produces no observable diffracted beams. Permanent gratings in damaged areas can be produced with more intense beams. The intensity of a diffracted order appears to depend on the product of the intensities of the incident beams. Several applications of the temporary grating are suggested.
17 citations
12 May 2008
TL;DR: The gamma-ray laser has been shown to be feasible if some real isotope has its properties sufficiently close to the ideals modeled as mentioned in this paper, and the greatest positive impact upon feasibility has come from the discovery of giant resonances for pumping nuclei that greatly reduce the levels of pump power needed.
Abstract: A gamma‐ray laser would stimulate the emission of radiation at wavelengths below 1 A from excited states of nuclei. However, the anticipation of a need for very high pump powers tended to discourage early research and the difficulties in demonstrating a device were first assumed to be insurmountable. Over the past decade advances in pulsed power technology have changed these perceptions and studies have built a strong momentum. The concept for a nuclear analog of the ruby laser now appears in the textbooks and many of the component steps for pumping the nuclei have been demonstrated experimentally. A quantitative model based upon the new data and concepts has shown the gamma‐ray laser to be feasible if some real isotope has its properties sufficiently close to the ideals modeled. The greatest positive impact upon feasibility has come from the discovery of giant resonances for pumping nuclei that greatly reduce the levels of pump power needed.
17 citations
01 Jan 1998
TL;DR: In this article, a ruby laser patient still had hypopigmentation 90 days after treatment, but only 10% evaporated instantaneously, while in Q-switched mode the ruby laser was experienced by approximately 10%, but only one evaporate instantaneously.
Abstract: ation was experienced by approximately 10%, but only one evaporate instantaneously. In Q-switched mode the ruby laser patient still had hypopigmentation 90 days after treatment. emits very short pulses in the nano-second range and hence Due to variability of hair density as well as anagen and endogenous and artificial pigment granules in the skin will be telogen phase durations in different anatomical locations, firm damaged selectively. This phenomenon has been utilized for conclusions regarding the long-term effect still cannot be drawn. tattoo removal (4, 5) and for treatment of benign pigmented
17 citations
TL;DR: In this article, the formation and arrangement of microcraters produced by an unfocused pulse of power density ∼ 100 MW/cm2 was discussed, where the pulses, of width 1.0 × 10−8 s, were generated by a ruby laser, Q-switched by vanadyl phthalocyanine.
Abstract: Q-SWITCHED laser pulses focused on to a metal cause microcraters at the surface1,2. This communication deals with the formation and arrangement of microcraters produced by an unfocused pulse of power density ∼ 100 MW/cm2. The pulses, of width 1.0 × 10−8 s, were generated by a ruby laser, Q-switched by vanadyl phthalocyanine.
17 citations