Accession Number : ADA255802


Title :   Fast Optoelectronic Switching Processes in Surface-Emitting Semiconductor Lasers and Nonlinear Etalons


Descriptive Note : Final technical rept. Sep 1989-Sep 1991


Corporate Author : NEW MEXICO UNIV ALBUQUERQUE


Personal Author(s) : McInerney, John G


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a255802.pdf


Report Date : May 1992


Pagination or Media Count : 41


Abstract : We describe theoretical and experimental research on optoelectronic switching processes in GaAs/AlGaAs multiple quantum well etalons, where the quantum wells are spaced by one half the optical wavelength at which the structure is designed to operate. Results have been obtained with the quantum wells pumped above threshold (i.e. the structure behaves as a surface-emitting laser) and below threshold (when it behaves as a saturable absorber with feedback). In the former case, high-speed (10 ps impulse response) switching has been demonstrated, but the threshold is relatively high. Some suggestions for more efficient switching are made. In the latter case, a detailed theoretical model has been developed which demonstrates the potential advantages and disadvantages of absorptive bistable optical switching in half-wave-periodic MQW etalons over the conventional non-resonant MQW or bulk structures. The initial experiments were promising but hampered by materials growth and uniformity problems. We include several specific recommendations for additional experiments to complete our investigations of the below threshold switching regime, as well as extension to 2-D switch arrays, new research directions and applications such as time-division multiplexing. Surface-emitting lasers, bistable optical switches, III-V semiconductor quantum well devices.


Descriptors :   *SEMICONDUCTORS , *LASERS , *SURFACES , *EMITTANCE , *NONLINEAR SYSTEMS , *OPTICAL SWITCHING , VELOCITY , MODELS , RESPONSE , GROUP III COMPOUNDS , DIVISION , SWITCHES , SWITCHING , MULTIPLEXING , TIME DIVISION MULTIPLEXING , GROUP V COMPOUNDS , GROUP IV COMPOUNDS , FEEDBACK , MATERIALS , TIME , GALLIUM ARSENIDES , ALUMINUM GALLIUM ARSENIDES , STRUCTURES , ARRAYS


Subject Categories : Inorganic Chemistry
      Lasers and Masers
      Electrooptical and Optoelectronic Devices


Distribution Statement : APPROVED FOR PUBLIC RELEASE