Fiber optic link

Details Fiber optic link Fiber optic link

1998-09-21

2000-12-05

Kim, Robert

Optical waveguides

Temporal optical modulation within an optical waveguide

Electro-optic

385 2, 359189, H04B 1100

Patent

active

061577529

ABSTRACT:
The present invention provides a fiber optic link utilizing asymmetric homodyne modulation and balanced detection to achieve a very high dynamic range. The link uses a Mach Zehnder Modulator to generate a double-sideband suppressed-carrier signal from a laser light signal of a carrier frequency and a modulating signal at a modulating frequency. The laser light signal is phase shifted and injected into the double-sideband suppressed-carrier signal. Two signals are generated wherein the fundamental components are out-of-phase. The two signals are input to a balanced receiver wherein the one signal is subtracted from the other, resulting in the fundamental components adding, thereby providing an improved fundamental signal.

REFERENCES:
patent: 4718121 (1988-01-01), Epworth
patent: 4893352 (1990-01-01), Welford
patent: 5084779 (1992-01-01), Stanley
patent: 5532857 (1996-07-01), Gertel et al.

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