Modulators – Amplitude modulator – Nonlinear device controlled by modulating signal
Patent
1986-04-28
1988-03-08
Tarcza, Thomas H.
Modulators
Amplitude modulator
Nonlinear device controlled by modulating signal
350 9629, G02F 134, G02B 514
Patent
active
047301716
ABSTRACT:
An optical fiber having a core and a cladding has its cladding interrupted and an electro-optic crystal disposed at the interruption, a modulating electric field being applied via electrodes to the crystal to control its refractive index and thereby modulate an optical signal carried by the fiber. In one embodiment the interruption in the cladding extends all around the core. In another embodiment the fiber is embedded in a curved position in epoxy material, and the epoxy material and fiber are ground down on the outside of the curve to interrupt the cladding and expose the core, the electro-optic crystal being provided on the ground surface. A second fiber can be inverted on the crystal to provide an optical coupler. The electro-optic crystal is for example a single crystal of a tetragonal phosphate.
REFERENCES:
patent: 3208342 (1965-09-01), Nethercot, Jr.
patent: 3312827 (1967-04-01), McNaney
patent: 3770339 (1973-11-01), Ramaswamy
patent: 3923373 (1975-12-01), Dabby et al.
patent: 4185884 (1980-01-01), McMahon
patent: 4386822 (1983-06-01), Bergh
patent: 4387954 (1983-06-01), Beasley
patent: 4392712 (1983-07-01), Ozeki
patent: 4461536 (1984-07-01), Shaw et al.
patent: 4474431 (1984-10-01), Bricheno
"High-Speed Cutoff Modulator Using a Ti-Diffused LiNbO.sub.3 Channel Waveguide", by A. Neyer and W. Sohler, pp. 256-258, Appl. Phys. Lett. 35(3), Aug. 1, 1979, American Institute of Physics.
"Analysis of a Tunable Single Mode Optical Fiber", by Michel J. F. Digonnet and Herbert J. Shaw, IEEE Journal of Quantum Electronics, pp. 746-754, vol. QE-18, No. 4, Apr. 1982.
"Nonlinear Single-Mode Fiber Coupler Using Liquid Crystals", by E. S. Goldburt and P. St. J. Russell, Appl. Phys. Lett. 46, 338 (1985).
"Electro-Optical Response of a Liquid-Crystalline Fiber Coupler", by E. S. Goldburt and P. St. J. Russell, Appl. Phys. Lett. 48(1), Jan. 6, 1986, pp. 10-12.
"Optical Pulse Compression and Breaking in Nonlinear Fibre Couplers", by R. Hoffe and J. Chrostowski, pp. 34-38, vol. 57, No. 1, Optics Communications, Feb. 1, 1986.
Hughes Richard P.
So Vincent C.
Vella Paul J.
Haley R. John
Hellner Mark
Northern Telecom Limited
Tarcza Thomas H.
LandOfFree
Optical signal modulators does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optical signal modulators, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical signal modulators will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-232824