Electro-optic analog-to-digital converter

Details Electro-optic analog-to-digital converter Electro-optic analog-to-digital converter

1978-10-10

1982-04-20

Corbin, John K.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340347AD, 350355, G02B 514

Patent

active

043256031

ABSTRACT:
Apparatus is disclosed for digitizing an applied analog signal. A plurality of closely-spaced parallel optical waveguide pairs are disposed in an electro-optic crystal substrate. A laser source applies light energy simultaneously to one waveguide of each waveguide pair. Electrical conductors disposed on the substrate and connected to a source of an analog signal apply signals therefrom across a coupling region of each of the plurality of waveguide pairs so as to induce coupling of the laser energy between one waveguide and the other waveguide of each of the pairs. The coupling regions are of different lengths for each of the waveguide pairs, the lengths of the coupling regions being related in a predetermined manner. The coupling is proportional to the applied analog signal and to the lengths of the coupling regions. A comparator is disposed so as to compare the output of both waveguides of each of the waveguide pairs and provide a digitized signal therefrom.

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