Title :
Transverse mode formation in microlasers by combined gain- and index-guiding
Author :
Serrat, Carles ; van Exter, M.P. ; van Druten, N.J. ; Woerdman, J.P.
Author_Institution :
Huygens Lab., Leiden Univ., Netherlands
fDate :
9/1/1999 12:00:00 AM
Abstract :
The formation of transverse modes in end-pumped microlasers with combined index- and gain-guiding is investigated theoretically, We study the case of a planoconcave cavity pumped by means of a Gaussian optical field in the frame of the effective index method and the mean-field limit. We find crossings of the modal gains as the cavity losses are varied. Ring patterns are observed in both the near- and far-field profiles in qualitative agreement with the experiments. We study the bad-cavity region and observe one compact trapped gain-guided mode with large modal gain, and many other deformed index-guided modes with much less gain
Keywords :
laser modes; laser theory; micro-optics; microcavity lasers; solid lasers; Gaussian optical field; bad-cavity region; cavity losses; deformed index-guided modes; effective index method; far-field profit; gain-guided mode; gain-guiding; index-guiding; large modal gain; mean-field limit; microlasers; near-field profiles; planoconcave cavity; ring patterns; transverse mode formation; Laser modes; Laser theory; Microchip lasers; Mirrors; Optical pumping; Optical waveguide theory; Optical waveguides; Refractive index; Ring lasers; Waveguide lasers;
Journal_Title :
Quantum Electronics, IEEE Journal of
