Title :
Resonator modes in a two-dimensional quasi-stadium laser diode with concave end mirrors
Author :
Fukushima, Takehiro ; Nishiyama, Kenta ; Sakaguchi, Koichiro ; Tokuda, Yasunori
Author_Institution :
Dept. of Commun. Eng., Okayama Prefectural Univ., Okayama, Japan
Abstract :
We investigated the resonator modes of a two-dimensional quasi-stadium laser diode with concave end mirrors by using an extended Fox-Li mode calculation method. The resonator modes were found to have a significant wavelength dependence due to beam interference in the laser cavity. A scar mode was observed in which optical beams are localized on unstable periodic orbits at a wavelength at which the diffraction loss has a local minimum. These results are similar to those obtained for a quasi-stadium laser with convex end mirrors, but we found that using a concave mirror does not produce intensely focused spots in the laser cavity, making it suitable for high-power operation.
Keywords :
interference; laser beams; laser cavity resonators; laser mirrors; laser modes; light diffraction; semiconductor lasers; beam interference; concave end mirrors; diffraction loss; extended Fox-Li mode calculation method; high power operation; intensely focused spot; laser cavity; resonator modes; scar mode; two dimensional quasistadium laser diode; unstable periodic orbits; Diode lasers; Interference; Laser beams; Laser modes; Mirrors; Optical beams; Optical diffraction; Optical resonators; Orbital calculations; Orbits; concave end mirror; high power operation; quasi-stadium laser diode; resonator mode;
Conference_Titel :
Transparent Optical Networks (ICTON), 2010 12th International Conference on
Conference_Location :
Munich
Print_ISBN :
978-1-4244-7799-9
Electronic_ISBN :
978-1-4244-7797-5
DOI :
10.1109/ICTON.2010.5549311
