Differential self-electrooptic effect device

Details Differential self-electrooptic effect device Differential self-electrooptic effect device

1995-06-30

1997-07-08

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

257 21, H01L 5100

Patent

active

056463952

ABSTRACT:
Optical analog information processing capability is achieved by providing a SEED device configured to operate in a differential mode. This "differential SEED" utilizes pairs of input signal beams to represent bipolar analog data and to process those data in a linear fashion. The difference in the optical powers of the input signal beams is used to modulate the absorption of power supply beams in quantum well diodes, such that the difference in the absorbed powers in the quantum well diodes is proportional to the difference in the powers of the input signal beams. The differential SEED can be configured to perform various image processing operations on bipolar analog data, including, for example, image addition and subtraction, optical multiplication, and evaluating spatial derivatives.

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