All optical analog-to-digital converter

Details All optical analog-to-digital converter All optical analog-to-digital converter

1988-06-22

1990-08-07

Shoop, Jr., William M.

Coded data generation or conversion

Analog to or from digital conversion

Using optical device,

350 9614, H03M 112, G02F 700

Patent

active

049471708

ABSTRACT:
A fully optical A/D converter is disclosed in which the difference in light intensity from two outputs of a two-arm interferometer in each channel is detected. The difference in light intensity is varied in accordance with a phase shift in the light passing through one arm of the interferometer. The phase shift is accomplished by the use of a non-linear optical material, the optical properties of which are altered based on the characteristics of an input optical signal to be digitized. Thus, the difference in light intensity corresponds to the magnitude of the input optical signal.

REFERENCES:
patent: 4147979 (1979-04-01), Baues et al.
patent: 4431263 (1984-02-01), Garito
patent: 4536450 (1985-08-01), Garito
patent: 4609252 (1986-09-01), Wong et al.
patent: 4626075 (1986-12-01), Chemla
patent: 4775215 (1988-10-01), Teng et al.
patent: 4786129 (1988-11-01), Webb
patent: 4787714 (1988-11-01), Greene et al.

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