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Articles 721 - 724 of 724
Full-Text Articles in Electrical and Computer Engineering
Cylindrical Laser Resonators, Lee W. Casperson
Cylindrical Laser Resonators, Lee W. Casperson
Electrical and Computer Engineering Faculty Publications and Presentations
A general class of cylindrical laser resonators is described in which the radiation propagates partially in the radial direction. There is a strong focusing of energy at the axis of such resonators. The low-loss cavity modes are related to ordinary gaussian beam modes. Two limiting forms are the disk laser and the tube laser, and some applications are considered.
Gain And Dispersion Focusing In A High Gain Laser, Lee W. Casperson, Amon Yariv
Gain And Dispersion Focusing In A High Gain Laser, Lee W. Casperson, Amon Yariv
Electrical and Computer Engineering Faculty Publications and Presentations
The transverse modes of a laser resonator containing a medium with a strong radial gain profile differ greatly from the modes of a similar resonator containing a low gain medium. Focusing and defocusing effects result from the gain profile and from the associated dispersion profile. The dispersion focusing causes an asymmetry in the power output as the laser is tuned across the gain line. The theory has been verified using a high gain 3.51-µ xenon laser.
Longitudinal Modes In A High-Gain Laser, Lee W. Casperson, Amon Yariv
Longitudinal Modes In A High-Gain Laser, Lee W. Casperson, Amon Yariv
Electrical and Computer Engineering Faculty Publications and Presentations
In lasers employing high‐gain narrow‐linewidth transitions the theory predicts major departures of the mode‐splitting frequencies from their low‐gain values as well as a new type of mode splitting. The first of these effects consisting of a reduction by a factor of 2.5 of the mode splitting in a xenon 3.51‐μ laser is observed experimentally.
The Gaussian Mode In Optical Resonators With A Radial Gain Profile, Lee W. Casperson, Amon Yariv
The Gaussian Mode In Optical Resonators With A Radial Gain Profile, Lee W. Casperson, Amon Yariv
Electrical and Computer Engineering Faculty Publications and Presentations
The dependence of the parameters of the Gaussian mode in laser resonators on the properties of the medium in the cavity is studied. Experimental verification of the theoretical results is presented. It is found that the modes in a high‐gain laser may differ widely from the usual free space resonator results. Also, resonator configurations which in free space are unstable may, with a suitable medium, support low‐loss Gaussian modes.