Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1990-12-31
1994-04-05
Pascal, Leslie
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359181, 359246, 359254, 385 3, H04B 1004
Patent
active
053010582
ABSTRACT:
Optical communication methods and apparatus are disclosed for transmitting two or more optical signals with different optical carrier frequencies on a single optical fiber with high spectral efficiency. Each optical carrier is typically modulated with multiple modulated subcarriers. In one embodiment, an optical phase modulator provides cancellation of second order intermodulation products in each optical signal, thereby permitting the optical carrier frequencies to be spaced by 2f.sub.max, where f.sub.max is the maximum modulation frequency. In another embodiment, a single sideband optical phase modulator provides cancellation of second order intermodulation products and one signal sideband, thereby permitting the optical carrier frequencies to be spaced by f.sub.max.
REFERENCES:
patent: 4291939 (1981-09-01), Giallorenzi
patent: 4502037 (1985-02-01), Le Parquier
patent: 4694276 (1987-09-01), Rastegar
patent: 4769853 (1988-09-01), Goodwin
patent: 4856094 (1989-08-01), Heidrich
patent: 4893352 (1990-01-01), Welford
patent: 5031235 (1991-07-01), Raskin
patent: 5074631 (1991-12-01), Hamano
patent: 5101450 (1992-03-01), Olshansky
Lin, "Reduction of Intermodulation Distortion of Interferometric Optical Modulators through Incoherent Mixing of Optical Waves", Electronic Letters, vol. 26, No. 23, pp. 1980-1982, Nov. 8, 1990.
R. Olshansky et al., 60-Channel FM Video Subcarrier Multiplexed Optical Communication System, Electronics Letters, vol. 23, No. 22, pp. 1196-1198, Oct. 1987.
Alferness, Guided-Wave Devices for Optical Communication, IEEE Journal of Quantum Electronics, vol. QE-17, No. 6, Jun. 1981, pp. 946-959.
N. Takato et al, Silica-Based Integrated Optic Mach-Zehnder Multi-Demultiplexer Family with Channel Spacing of 0.01-250 nm, IEEE Journal of Selected Areas of Communication, vol. 8, pp. 1120-1127, Aug. 1990.
J. Stone et al., Pigtailed High Finesse Tunable Fiber Fabry-Perot Interferometers with Large, Medium and Small Free Spectral Ranges, Electronics Letters, vol. 23, pp. 781-783, 1987.
H. Soda et al., Stability in Single Longitudinal Mode Operation in GaInAsP/InP Phase-Adjusted DFB Lasers, IEEE J. Quantum Electronics, vol. QE-23, Jun. 1987, pp. 804-814.
Derr, Optical QPSK Homodyne Transmission of 280 Mbit/s, Electronics Letters, vol. 26, No. 6, pp. 401-403.
GTE Laboratories Incorporated
Monks Lawrence E.
Pascal Leslie
LandOfFree
Single sideband optical modulator for lightwave systems does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Single sideband optical modulator for lightwave systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Single sideband optical modulator for lightwave systems will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-516250