Programmable delay line using laser diode taps

Details Programmable delay line using laser diode taps Programmable delay line using laser diode taps

1995-08-17

1997-06-24

Sikes, William L.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

359285, 359140, 385 7, G01J 104

Patent

active

056419546

ABSTRACT:
A series of taps are created within an acousto-optic cell by imaging an array of LEDs within the cell. The illuminated tap regions are selectively changed by energizing selected LEDs. The electrical input signal produces a travelling acoustic wave within the cell and when the wave crosses illuminated tap regions, electrical output signals are produced having delays proportional to the positions of illuminated LEDs in the array. The magnitude of the output signal is proportional to the LED light intensity which is varied to produce a weighted output signal.

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