# Laser resonators

## Sub-kHz lasing of a CaF$_2$ whispering gallery mode resonator stabilized fiber ring laser

We utilize a high quality calcium fluoride whispering-gallery-mode resonator to passively stabilize a simple erbium doped fiber ring laser with an emission frequency of 196THz (wavelength 1530nm) to an instantaneous linewidth below 650Hz. This …

## Dramatic shape sensitivity of directional emission patterns from similarly deformed cylindrical polymer lasers

Recent experiments on similarly shaped polymer microcavity lasers show a dramatic difference in the far-field emission patterns. We show, for different deformations of the ellipse, quadrupole and hexadecapole, that the large differences in the …

## Gaussian-optical approach to stable periodic orbit resonances of partially chaotic dielectric micro-cavities

The quasi-bound modes localized on stable periodic ray orbits of dielectric micro-cavities are constructed in the short-wavelength limit using the parabolic equation method. These modes are shown to coexist with irregularly spaced �??chaotic�?? modes …