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Optimization of the optical switching characteristics of two-section Fabry-Perot lasers

: Hörer, J.; Weich, K.; Möhrle, M.; Sartorius, B.


IEEE Photonics Technology Letters 5 (1993), Nr.11, S.1273-1276
ISSN: 1041-1135
Fraunhofer HHI ()
optical bistability; optical saturable absorption; optical switches; semiconductor lasers; optimization; optical switching characteristics; two-section fabry-perot lasers; bistable two-section fabry-perot lasers; gain; optical switching contrast; device performance; section lengths; current conditions; gain section; absorber section; all optical switching gain; large contrast; saturable absorber; 26 db; InGaAsP-InP

Bistable two-section Fabry-Perot lasers with a saturable absorber have been fabricated, comprehensively characterized, and optimized with respect to gain and optical switching contrast. Best device performance requires the individual optimization of both section lengths, and a proper choice of current conditions. Light has to be injected into the gain section, instead of the absorber section, to take full advantage of device qualities. Based on this optimization high, all optical switching gain (26 dB) and large contrast (18 dB) have been achieved simultaneously.