Optical waveguides – With optical coupler
Patent
1992-12-08
1994-06-14
Ullah, Akm E.
Optical waveguides
With optical coupler
G02B 628
Patent
active
053217802
ABSTRACT:
An optical memory having a light valve for each memory bit. Each bit is programmed in a WRITE mode to pass or inhibit optical energy emitted from a local source of illumination and thus store a binary value of "1" or "0". A short length of optical fiber guides light from the light valve in a READ mode to the core of a transmission fiber which acts as a series transmission line for an optical pulse sequence when each of a plurality of the light valves is illuminated by a respective optical source, e.g., a light emitting diode. An optical energy absorbing termination is located at one end of the series transmission fiber while an optical amplifier device is located at the opposite or output end and, where necessary in between, with the amplified pulse sequence from the transmission fiber being thereafter coupled to one or more individual optical receiver and transducer units which generate respective corresponding electrical utilization signals.
REFERENCES:
patent: 3042912 (1962-07-01), Gilbert
patent: 3322482 (1967-05-01), Harmon
patent: 3432675 (1969-03-01), Roby
patent: 3492493 (1970-01-01), Herriott
patent: 3526880 (1970-09-01), Filippazzi
patent: 3543248 (1970-11-01), Oliver
patent: 3728521 (1973-04-01), Borough
patent: 3985423 (1976-11-01), Tseng
patent: 4362358 (1982-12-01), Hafle
patent: 4647765 (1987-03-01), Imaizumi et al.
patent: 4680809 (1987-07-01), Hartkopf et al.
patent: 4957340 (1990-09-01), Kirkby
patent: 4962986 (1990-10-01), Hompel
patent: 5043976 (1991-08-01), Abiven et al.
Liquid Crystals, "Nature's Delicate Phase of Matter", Peter J. Collings, Princeton Univ. Press, Princeton, N.J., 1990, pp. 69-70 and 115-117.
Optical-Fiber Telecommunications II, "Light-Emitting Diodes for Telecommunications", Chap. 12. Tien Pei Lee et al, pp. 467-469, 509, 528-531.
Optoelectronics-An introduction, Sec. Ed., J. Wilson et al, Prentice Hall, 1989, pp. 144-148.
Liquid Crystals & Plastic Crystals, vol. 2, Gray & Winsor, Halstead Press, 1974, Chapter 2-Optical Properties of Liquid Crystals, pp. 24-61.
Applied Physics Letter, vol. 36, No. 11, Jun. 1, 1980, "Submicro-second Bistable Electro-optic Switching In Liquid Crystals", Noel A. Clark et al. pp. 899-901.
Electronics Letters, Jan. 2, 1992, vol. 28, No. 1, "Programmable Binary Phase-Only Optical Device Based on Ferroelectric Liquid Crystal SLM", S. E. Broomfield et al., pp. 26-28.
Applied Physics Letter, 47 (12), Dec. 15, 1985, "Room-Temperature Switching Behavior of Ferroelectric Liquid Crystals in Thin Cells", J. S. Patel, pp. 1277-1279.
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