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.

Generating and recording transient bending waves in plates by pulsed lasers

Abstract: We have presented a method to generate bending waves in a plate by focusing a Q-switched Nd:YAG-laser pulse on its surface. These waves are recorded by double pulsed hologram interferometry. Evaluation of the interferograms show that the bending wave pattern is very similar to what is predicted by the Kirchhoff plate equation assuming a point impact of infinitesimally short duration. This indicates that a short Nd:YAG-laser pulse may be considered as a Dirac pulse in space and time. Future investigations will be performed with a more powerful and “cleaner” laser to get a higher energy and impulse transfer to the plate thus giving bending waves of larger amplitude. Promising preliminary experiments have also begun using a double pulsed ruby laser both for generating and recording of bending waves.

Pulsed laser annealing of selenium implanted InP

Abstract: Rutherford back-scattering, Hall effect and Nomarski interference microscopy have been used to study 200 keV selenium ions implanted into InP in the dose range 1*1014 to 1*1015 cm-2. Samples were irradiated with single pulses from a Q-switched ruby laser in the energy range 0.2 to 2.2 J cm-2. It was found that capless laser irradiation does not allow complex recrystallisation of damaged InP, and an energy density of 0.3 J cm-2 causes surface decomposition, thus producing indium-rich surface layers. To ensure that the measured electrical properties were due to the implanted atoms alone it was found necessary to thermally anneal samples at 4000DC for 5 min after the laser irradiation. The activity was 26% and the mobility of 300 cm2 V-1 s-1 for a dose of 1*1015 Se+ cm-2 irradiated at 0.5 J cm-2.

Versatile Lidar for Atmospheric Studies, Including Plume Dispersion, Clouds, and Stratospheric Aerosol

Abstract: A transportable scanning lidar for studying clouds, plume dispersion, and stratospheric aerosal at any of three wavelengths is described. A ruby laser transmits linearly polarized light of 694.3 nm wavelength at a maximum 0.8 s−1 pulse rate. The lidar can discriminate between parallel, orthogonal, or combined polarizations of backscatter in a multichannel receiver. The lidar can simultaneously operate at the frequency-doubled wavelength of 347.2 nm. A frequency-doubled Nd:YAG laser, emitting at 532.0 nm and at a maximum pulse rate of 10 s−1, normally Performs mapping of plume structure. Range resolution, including receiver response, is less than 7 m. The sample interval is typically 3 m for plume experiments and 15 m for stratospheric aeroso1 profiles. Beam divergence is less than 1.0 mrad, and the receivers field of view is adjustable up to 6 mrad. The lidar's sensitivity can be altered over a wide dynamic range by selection of optical filters in the receiver and adjustments in the photomultipli...

A continuously pumped repetitively Q-switched ruby laser and applications to frequency-conversion experiments

Abstract: A repetitively Q -switched ruby laser with 30-kW 30-ns pulses, suitable for many nonlinear optics experiments, is described. Using this laser SHG in KDP located outside the laser cavity yielded ≳ 4-kW pulses at 3472 A with conversion efficiencies of ∼16 percent at the peak. A correction to existing SHG theories accounting for pump depletion (important at high conversions) has been calculated with the resulting improvement in agreement between theory and experiment. Experiments involving stimulated Raman scattering and vacuum UV generation from laser-produced plasmas are briefly described.