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.

A method for measuring the direction of the magnetic field in a Tokamak plasma by laser light scattering

Abstract: For scattering wavenumbers k such that alpha =(1/k lambda D) > Omega e, that resolution of the spectrum shape by conventional means is not possible. It is shown in this paper that the peaks are superimposed when the scattered light is passed through a Fabry-Perot etalon of free spectral frequency range equal to the electron cyclotron frequency. The resulting modulation, and consequently the effect of the magnetic field, can then be detected even with a ruby laser source.

Ultrasonic‐Diffraction Shutters for Optical Maser Oscillators

Abstract: The ultrasonic‐diffraction effect was utilized as a shutter to gate and amplitude modulate the output of a ruby optical maser (laser) by regulating the optical feedback within the Fabry‐Perot interferometer. In addition, an oscillation resembling limit cycle operation was induced in the ruby laser by an ultrasonic‐progressive wave that periodically changed the optical path length between the interferometer reflectors by varying the refractive index.

Treatment of CIN by Destruction — Laser

Abstract: The word laser is an acronym derived from the first letters of the words Light Amplification by Stimulated Emission of Radiation. The laser is a device which converts some form of energy such as heat, light or electricity into radiant energy of a special kind at one or more discrete wavelengths. When the wavelength and radiant energy lies within the visible portion of the electro-magnetic spectrum it is called light with which we are all familiar. Not all lasers emit their radiant energy as light but the radiation emitted by all lasers has three special qualities. It is coherent (all the waves are exactly in phase with each other in both space and time); it is collimated (the rays are parallel to each other); and it is monochromatic (all the waves are exactly the same wavelength).

Transient Interference Studies of Passively Q-Switched Ruby-Laser Emission

Abstract: An experiment has been performed to examine the time variation of the position and visibility of a transient interference pattern from a single‐mode, passively Q‐switched ruby laser. A blue shift in the emission frequency as a function of time is observed. The power‐dependent rate of frequency shift is 3.4 MHz/nsec·MW. This frequency shift is consistent with the results from previous experiments with a normally spiking ruby laser. A model is proposed which correlates the change in optical length of the ruby to changes in population inversion during emission. Predictions based on the model are in agreement with experimental results and with previous work.

Study of the output spectra of ruby laser

Abstract: The frequency separation between transverse modes of a ruby laser is measured using a Fabry-Perot interferometer and a high-speed camera. The results are compared with the theoretical predictions based on the curved-reflector theory. Satisfactory agreement is obtained. The measurements are verified by studying the output of the laser after application of transverse mode selection. The mode selection technique is based on the control of the reflector size, and results in single-transverse-mode operation at high pumping levels. Time dependence of the longitudinal mode spectrum of a single-transverse mode laser is studied. Particularly orderly mode-hopping sequences from shorter to longer wavelengths are observed. The spectrum of a relatively high-output laser which shows regular pulsations is similarly examined. The spectrum shows some interesting features, which include a near continuum during regular pulsations and repetitive shifts of the high intensity portion of the spectrum from short to long wavelengths.