Optical waveguides – With optical coupler – Plural
Patent
1996-09-09
1998-05-26
Ullah, Akm E.
Optical waveguides
With optical coupler
Plural
385 4, G02B 628, G02F 1295
Patent
active
057579920
ABSTRACT:
A single fiber communication system which uses a short pulse light source in conjunction with a short pulse detector. The short pulse source transmits a short pulse carrier signal that is passed down an optical fiber to a reflective modulator. The reflective modulator imparts a modulation to the carrier and reflects it back up the fiber where it is detected by the short pulse light detector. Through the use of short pulses the invention is able to overcome the problem of fiber reflection. The reflected modulated pulse is easily separated from the undesired reflections from the fiber, thereby eliminating noise in the detected signal and increasing the effectiveness of the single fiber system.
REFERENCES:
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patent: 4436365 (1984-03-01), Hodgins et al.
patent: 5502782 (1996-03-01), Smith
patent: 5621560 (1997-04-01), Wood
T.H. Wood et al., J. Lightwave Technology, vol. 6, No. 2, Feb. 1988, "Observation of Coherent Rayleigh Noise in Single-Source Bidirectional Optical Fiber Systems", pp. 346-352.
P.F. Barbara et al. eds., Ultrafast Phenomena IX: Proceedings of the 9th International Conference, Dana Point, CA, May 2-6, 1994, 60 Series in Chemical Physics (Springer-Verlag, New York, 1995), pp. 3-16, 39-43, 159-220.
Lucent Technologies - Inc.
Ullah Akm E.
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