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.

Dynamics of laser-produced carbon plasma

Abstract: Carbon plasmas produced by radiation from a ruby laser (wavelength 694.3 nm) focussed onto a carbon target in vacuum are studied spectroscopically with a time resolution of 40 ns. Measured line profiles of several ionic species (CI-CIV) were used to infer electron density and temperature at several positions above the target surface as function of time elapsed after the beginning of the laser pulse. The particle density at several positions above the target surface as function of time was judged from corrected line intensities. Experimental data are compared with theoretical predictions made with the effusion model of plasma expansion (Kelly R and Braren B 1991 Appl. Phys. B 53 160). The effusion model provided the relative particle density in the expanding plasma cloud as a function of initial target temperature. By comparing predicted and measured time evolution of particle density, an initial target temperature of about 125eV was inferred. The coupling of the laser beam energy to the plasma itself was inferred from the failure of the model of the direct target surface heating (Andreic Z, Henc-Bartolic V and Kunze H-J 1993 Physica Scripta 48 331) to produce the required target temperature.

Nonresonant third‐order optical response of polyphenyl acetylene

Abstract: Optical phase conjugation by degenerate four‐wave mixing in samples of pristine and iodine‐doped polyphenylacetylene at ruby laser wavelength (694.3 nm) is reported here. The nonresonant values of the third‐order optical susceptibility χ(3) are determined from the measurements of reflectivity of phase conjugate signals.

Measurements of Cavity Loss in a Pulsed Ruby Laser

Abstract: IN a cavity laser system, oscillation by stimulated emission occurs when the gain is sufficient to overcome the total loss in the cavity. Cavity loss not only determines the threshold condition of laser emission, it is also related to various properties of the laser output, such as the mode structure and the mode pulling effects. It is therefore important to measure accurately the cavity loss in a laser system. Previous workers have used the threshold electric input energy of the xenon flashtube as a means of evaluating the cavity loss for a pulsed ruby laser1–3. The non-linear behaviour of the xenon flashtube can cause measurement error, especially when the measurement was made over a wide range of temperature. There are two parts to this non-linear property: the total and peak radiant outputs in the pumping band are not linearly proportional to the electric input to the flashtube4, and the dependence on time of the radiant output varies with the electric input. However, if the time-varying flashtube radiant output power in the pumping band of the laser is directly measured, the total threshold radiant energy can be obtained by time integration of this pumping power up to the onset of the laser emission, assuming that the fluorescence decay time is long. This results in a loss measurement independent of the non-linearity of the flashtube.