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.

Laser welding: The present state-of-the-art

Abstract: : The evolution of laser systems is briefly reviewed from the first successful operation of the ruby laser in 1960 to the present. Laser materials processing developments are then reviewed followed by general discussions of currently available high power laser equipment, laser welding performance, laser weld characteristics, and the properties of laser welds in metals and alloys. A discussion of current industrial laser welding applications is also included. The report constitutes an effort to comprehensively review the important developments in laser welding up to the summer of 1975. (Author)

Comparison between sequentional treatment with diode and alexandrite lasers versus alexandrite laser alone in the treatment of hirsutism.

Abstract: Laser systems that are commonly used for the treatment of hirsutism include the ruby laser (694 nm), the diode laser (800 nm), the alexandrite laser (755 nm) and the Nd:YAG laser (1084 nm) The diode laser and alexandrite laser are considered effective in treatment of hirsutism in dark-skinned patients The response of hairs to these laser systems is variable and not complete In this study, we compared the efficacy of these two laser systems for permanent hair removal This was a randomized, controlled clinical trial that was performed with women of the age range 15-45 years old After obtaining informed consent, the samples were randomized into two groups using random allocation software The first group was treated with alexandrite laser alone (four sessions, two months apart) The second group was treated sequentially with diode laser for the first two sessions and alexandrite laser for the next two sessions Overall, 111 patients (57 patients in the alexandrite laser group and 54 patients in the sequential diode-alexandrite laser group) were evaluated There was no significant difference regarding mean of hair reduction between the two groups during the courses of treatment Except for the first session, there was no significant difference regarding percent of patient satisfaction between the two groups (P value >005) Comparison between the two groups showed no significant difference one month, three months and six months after the last treatment (P value >005) Regarding the results of our study, there is no significant difference between sequential treatment with diode and alexandrite lasers versus alexandrite laser alone in the treatment of hirsutism We suggest that in further studies, the efficacy of sequential treatment with other laser systems is evaluated against single treatment methods

Refractive fringe diagnostic of spherical shocks

Abstract: The refractive fringe diagnostic was applied to a spherical shock wave in air generated by an arc discharge. A pulsed ruby laser, synchronized with the shock generation, was used as the probe beam. Both fine and coarse fringes were observed and were modelled computationally. Agreement with the broad features of the density profile predicted by theory was obtained, but the gradient of the theoretical shock rear was found to be too shallow. The shock tail was seento be stationary over a duration of hundreds of microseconds.

Holographic Generation of Multi-Bubble Systems

Abstract: A new holographic method for the simultaneous production of several bubbles in a liquid is presented. Computer generated Fresnel and Fourier transform binary phase holograms formed in photoresist are used to split a ruby laser pulse. Holograms yielding systems of two or five bubbles each in silicone oil have been successfully employed in the laboratory. Preliminary results are given.