Title :
Analysis of reflectivity for a beveled corner mirror in semiconductor ring lasers
Author :
Mizutani, Natsuhiko ; Numai, Takahiro
Author_Institution :
Canon Res. Center, Kanagawa, Japan
fDate :
2/1/2001 12:00:00 AM
Abstract :
A semiconductor ring laser is expected to be used as a tiny ring laser gyro with low power consumption, which is suitable for mobile systems. However, its corner mirrors may be beveled due to its fabrication processes. Therefore, in this paper, reflectivities of beveled corner mirrors in the semiconductor ring laser are examined. In the analysis here, a guided fundamental mode is expanded into plane waves, and thus vertical confinement of the guided mode is completely incorporated. It is revealed that there is an optimum guiding layer thickness of approximately 0.3 μm to minimize mirror losses in the beveled mirrors. Also, facet reflectivities of equilateral n-polygon shaped ring lasers with beveled mirrors are studied, and it is found that a large n leads to a low threshold current
Keywords :
laser cavity resonators; laser mirrors; light polarisation; light reflection; optical planar waveguides; optical waveguide theory; reflectivity; ring lasers; semiconductor lasers; 0.3 micron; beveled corner mirror; equilateral n-polygon shaped ring lasers; facet reflectivities; guided mode; low power consumption; mirror losses; mobile systems; optimum guiding layer thickness; reflectivity analysis; ring laser gyro; semiconductor ring lasers; threshold current; vertical confinement; Laser modes; Laser theory; Mirrors; Optical waveguides; Power lasers; Reflectivity; Ring lasers; Semiconductor lasers; Semiconductor waveguides; Waveguide lasers;
Journal_Title :
Lightwave Technology, Journal of
