Optimum asymmetric mirror facet structure for high-efficiency semiconductor lasers

Optimum asymmetric mirror facet structure for high-efficiency semiconductor lasers

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 reflectiv...

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Veröffentlicht in:IEEE journal of quantum electronics 1993-06, Vol.29 (6), p.1918-1923
Hauptverfasser: Higashi, T., Ogita, S., Soda, H., Kobayashi, H., Kurakake, H., Aoki, O., Okazaki, N.
Format: Artikel
Sprache:eng
Schlagworte:
Equations
Exact sciences and technology
Fiber lasers
Fundamental areas of phenomenology (including applications)
Laser theory
Lasers
Mirrors
Optical design
Optical fiber amplifiers
Optical losses
Optics
Physics
Quantum well lasers
Reflectivity
Semiconductor lasers
Semiconductor lasers
laser diodes
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Zusammenfassung: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.< >
ISSN:0018-9197
1558-1713
DOI:10.1109/3.234454