Abstract

At the end of the seventies, with the development of the 2-dimensional, planar, so-called "halo lasers," we verified that 1-dimensional radiation is not an inherent property of lasers since it is not a consequence of the physical properties of the lasing process.^1,2 In the past 10 years 3-dimensional lasers have also been developed in several laboratories on specially pumped spheres and droplets.³ All of the "non-line-like laser" work has been a nice piece of scientific work, even from the point of view of possible natural cosmic laser processes, but it offered no practical advantages.

© 1994 IEEE