Optical modulation device and fiber optic communication system

Details Optical modulation device and fiber optic communication system Optical modulation device and fiber optic communication system

1996-07-03

1998-03-03

Ngo, John

Optical waveguides

Temporal optical modulation within an optical waveguide

Electro-optic

385 24, 359154, 359181, 359245, G02B 610

Patent

active

057244596

ABSTRACT:
A optical divider equally divides a optical carrier into first and second optical carriers. A 180.degree. divider divides an RF sub-carrier signal into first and second RF sub-carrier signals whose phases are 180.degree. inverted from each other. An electro-optic modulator modulates the first optical carrier with the first RF sub-carrier signal and outputs a first optical signal. An electro-optic modulator modulates the second optical signal with the second RF sub-carrier signal and outputs a second optical signal. Photodiodes convert the first and second optical signals transmitted by the optical fibers into first and second electric signals, respectively. A 180.degree. combiner inverts by 180.degree. the phase of the first electric signal and combines it with the second electric signal.

REFERENCES:
patent: 5351317 (1994-09-01), Weber
patent: 5363230 (1994-11-01), Djupsjobacka
patent: 5467414 (1995-11-01), Birkmayer et al.
patent: 5488677 (1996-01-01), Tokano
Asher Madjar et al., "A Balanced Fiberoptic Communication Link Featuring Laser Rin Cancellation", IEEE Microwave Theory and Techniques Society, 1992 Symposium Digest (1992 IEEE MTT-S Digest); pp. 563-566.
Hiroyo Ogawa et al.; "Fiber Optic Microwave Links Using Balanced Laser Harmonic Generation, and Balanced/Image Cancellation Laser Mixing", IEEE Microwave Theory and Techniques Society, 1992 Symposium Digest (1992 IEEE MTT-S Digest); pp. 559-562.

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