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.

Multiple Ruby Laser System For High Speed Photography

Abstract: A multiple ruby laser system is used to provide intense, extremely short (30 ns) highly monochromatic light pulses for high speed photography. The light output from the lasers is transmitted to the two optical systems with fiber optic light guides. The ruby lasers are employed with a conventional Cranz-Schardin system in dynamic photoelastic studies of stress waves and in studies of crack branching in tempered glass. The ruby lasers are employed with an unorthodox Cranz-Schardin system in ballistics studies of armor penetration. Of particular importance is the use of a microprocessor which provides precise synchronization by computing in real time the anticipated arrival time and controlling the Q-switching of the lasers. Variations in projectile velocity due to projectile weight, charge density, and drag are accommodated by programming the microprocessor.

Laser-stimulated nucleation in a bubble chamber.

Abstract: Laser simulated nucleation in bubble chamber, comparing sensitivity with radioactively stimulated nucleation

Laser excitation of gigahertz vibrations in Cauliflower mosaic viruses’ suspension

Abstract: The interaction of laser pulses with the Cauliflower mosaic virus (CaMV) in a Tris-HCl pH7.5 buffer is investigated. 20 ns ruby laser pulses are used for the excitation. Spectra of the light passing through the sample and reflected from it are registered with the help of a Fabri–Perot interferometer. Stimulated low-frequency Raman scattering (SLFRS) in a CaMV suspension is registered. The SLFRS frequency shift, conversion efficiency and threshold are measured for the first time, to the best of our knowledge.

Luminescence and Photoconductivity in Silver Chloride with Laser Excitation

Abstract: In zone refined AgCl, luminescence can be excited by ruby laser light through two-photon processes, while the photoconductivity is a result of ionization of donors. The luminescence spectrum shows some phonon structure not observed with steady uv excitation.

Holmium : YAG Laser for Intra Corporeal Lithotripsy.

Abstract: Albert Einstein can be considered the ‘father’ of laser (light amplification by the stimulated emission of radiation) technology [1]. It was almost seven decades later in 1968 that Mulvaney and Beck [2] developed a ruby laser capable of calculus fragmentation with considerable expenditure of energy, resulting in excessive heat production. The thermal effects on the surrounding tissues precluded its clinical use. Attempts were subsequently made to use continuous wave carbon dioxide and Neodymium : YAG (Nd: YAG) lasers. The inability to transmit carbon dioxide laser via non-toxic fibres suitable for endoscopic applications and thermal effects to adjacent soft tissues associated with the Nd:YAG devices limited their clinical usefulness [3]. Based on the initial experience with these lasers, an understanding of the necessary requirement for successful laser lithotripsy became apparent, including the ability to deliver energy through optical fibres, need to limit distant thermal effects and production of a shock wave of sufficient force to exceed the tensile strength of the stone [4]. The first commercially successful laser lithotrite was the coumarin pulse dye laser but it could not fragment cystine stones. In clinical use the pulsed dye laser has been safe and effective in Nd: YAG and Alexandrite lasers [5, 6]. The holmium: YAG (Ho: YAG) laser is the newest wavelength device available for urological applications. Investigational work for lithotripsy with the Ho: YAG laser dates back to 1990 and clinical use began in 1993. This multi-purpose laser combines the qualities of carbon dioxide and Nd: YAG laser in providing both tissue cutting and coagulation in single device. Since the holmium wavelength can be transmitted down optical fibres, it is especially suited for intracorpreal/endoscopic lithotripsy.