Variable semiconductor all-optical buffer using slow light...

Details Variable semiconductor all-optical buffer using slow light... Variable semiconductor all-optical buffer using slow light...

2005-05-31

2005-05-31

Schwartz, Jordan M. (Department: 2873)

Optical: systems and elements

Optical modulator

Light wave temporal modulation

C359S247000, C359S248000, C359S255000

Reexamination Certificate

active

06900920

ABSTRACT:
A variable semiconductor all-optical buffer and method of fabrication is provided where buffering is achieved by slowing down the optical signal using a control light source to vary the dispersion characteristic of the medium based on electromagnetically induced transparency (EIT). Photonic bandgap engineering in conjunction with strained quantum wells (QWs) and quantum dots (QDs) achieves room temperature operation of EIT. Photonic crystals are used to sharpen the spectral linewidths in a quantum well structure due to its density of states and in a quantum-dot structure caused by the inhomogeneity of the dot size, typically observed in state-of-the-art QD materials. The configuration facilitates monolithic integration of an optical buffer with an amplifier and control laser to provide advantages over other material systems as candidates for optical buffers.

REFERENCES:
patent: 4915482 (1990-04-01), Collins et al.
patent: 5157537 (1992-10-01), Rosenblatt
patent: 6177684 (2001-01-01), Sugiyama
patent: 6426831 (2002-07-01), Schmidt et al.
patent: 6507042 (2003-01-01), Mukai et al.
patent: 2002/0094597 (2002-07-01), Lin et al.

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