Title :
Optimum asymmetric mirror facet structure for high-efficiency semiconductor lasers
Author :
Higashi, Toshio ; Ogita, Shouichi ; Soda, Haruhisa ; Kobayashi, Hirohiko ; Kurakake, Hirohide ; Aoki, Osamu ; Okazaki, Niro
Author_Institution :
Fujitsu Labs, Ltd., Kanagawa, Japan
fDate :
6/1/1993 12:00:00 AM
Abstract :
A design theory for asymmetric mirror facet structure lasers that takes into account the spatial hole burning (SHB) effect along the cavity is presented. It is shown that the SHB effect reduces the external quantum efficiency in asymmetric mirror facet structure lasers, and the front facet reflectivity has an optimum value depending on the internal loss for high-efficiency operation. A slope efficiency of more than 50% has been obtained in lasers based on the new design theory. It is noted that nonuniform current injection is one of the most useful methods for increasing the external quantum efficiency, which is reduced by the SHB effect
Keywords :
laser accessories; laser cavity resonators; laser theory; mirrors; optical hole burning; semiconductor lasers; asymmetric mirror facet structure lasers; cavity; design theory; external quantum efficiency; front facet reflectivity; high-efficiency operation; high-efficiency semiconductor lasers; internal loss; nonuniform current injection; spatial hole burning; Equations; Fiber lasers; Laser theory; Mirrors; Optical design; Optical fiber amplifiers; Optical losses; Quantum well lasers; Reflectivity; Semiconductor lasers;
Journal_Title :
Quantum Electronics, IEEE Journal of
