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.

Refractive fringe diagnostic of a ruby-laser produced plasma using a short pulse, short wavelength nitrogen laser

Abstract: An improved analysis of the refractive fringe diagnostic is developed. The assumption of a ring focus used by earlier workers is shown to be invalid. The improved technique is used to analyse shadowgrams obtained using a synchronised sub-nanosecond nitrogen laser to probe a ruby-laser-produced plasma. Electron density profiles are de-convolved.

Double Line Stimulated Raman Scattering in Benzene

Abstract: Simultaneous stimulated Raman scattering at the 992 cm−1 and the 3063 cm−1 line of benzene is observed by mode-locked ruby laser pulse excitation. The double line stimulated Raman scattering is initiated by self-focusing. The influence of small-scale self-focusing, self-phase modulation, and cross-phase modulation on the double line stimulated Raman scattering is discussed. At low pump pulse intensities, before the onset of small-scale self-focusing, the steady-state Raman gain factors of both Raman lines are determined by Raman energy conversion efficiency measurements.

Nonlinear Behavior of Solutions Illuminated by a Ruby Laser

Abstract: The methods of calculating the deviations from Beer‐Lambert's law and other related phenomena in solutions illuminated by a ruby laser are analyzed and criticized carefully. These methods include the steady‐state and optically thin approximation as compared with the exact solution of a set of coupled differential equations which describe the temporal and spatial changes of the photons and populations of the various energy levels. Critical evaluation of the validity of the approximation is given. The computations are compared with the experimental data of Beer's law deviations, pulse shaping, recovery of the ground state after excitation, and blue and red fluorescence of solutions of cryptocyanine. A set of absorption cross sections and decay rates which fits best all these experiments is deduced.

Quasi-linear Dispersion Spherical Fabry-Perot Interferograms for Giant Pulse Laser Spectroscopy

Abstract: SPHERICAL interferometer fringes have previously been considered unsuitable for the production of a spectrum extending over several orders of the spectral range, chiefly because when the spherical mirrors are separated by exactly their radius of curvature1,2, the order of interference of the fringe pattern decreases as the fourth power of the radius. (With a plane Fabry–Perot instrument, the order of interference varies with the square of the radius.) In practice, however, spherical interferometers have been used successfully to measure the time resolved spectra of ruby laser relaxation oscillations3 and, more recently, for the direct spectral detection of off-axis modes in giant pulse ruby lasers4 and an intensity dependent frequency shift5. In circumstances like these the spherical instrument has the advantage of the high intensity of the illumination of the detector and the fact that the plates are always well adjusted.