Accession Number : ADA267753


Title :   High-Speed Nonlinear Switching Mechanisms and Devices for Multi-Gigabit Data Processing


Descriptive Note : Final rept. Feb 92-Feb 93,


Corporate Author : ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER


Personal Author(s) : Peyghambarian, N ; Johns, S ; Krol, M ; Boncek, R ; Stacy, J


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a267753.pdf


Report Date : May 1993


Pagination or Media Count : 14


Abstract : A high contract, low intensity GaAlInAs/AlInAs multiple quantum well asymmetric Fabry-Perot reflection modulator for operation at 1.3 um has been demonstrated. The reflection modulator takes advantage of the large absorptive and refractive nonlinearities associated with saturating the heavy-hole exciton resonance. We achieve an on/off contrast ratio in excess of 1000:1 (30 dB) and an insertion loss of 2.2 dB at a pump intensity of 30 kW/cm2, corresponding to a carrier density of 4.5 x 1017 cm-3. The modulator was demonstrated to have a large operating bandwidth achieving an on/off contrast ratio of greater than 100:1 over a 5 nm optical band. The operating speed of the modulator was measured and found to approach 1 GHz.... GaAlInAs/AlInAs multiple quantum well asymmetric Fabry-Perot reflection modulator.


Descriptors :   *DATA PROCESSING , *QUANTUM WELLS , *OPTICAL SWITCHING , *MODULATORS , *NONLINEAR OPTICS , VELOCITY , DENSITY , GALLIUM ARSENIDES , RESONANCE , PUMPS , LOW INTENSITY , EXCITONS , INSERTION LOSS , BANDWIDTH , TIME DIVISION MULTIPLEXING , REFLECTION , INTENSITY , RATIOS , CONTRAST , CONTRACTS


Subject Categories : Electrooptical and Optoelectronic Devices


Distribution Statement : APPROVED FOR PUBLIC RELEASE