Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1992-08-11
1995-11-28
Olms, Douglas W.
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359194, H04N 550
Patent
active
054713366
ABSTRACT:
A cold start control system and method for use in a coherent lightwave communications system, in which received signal light is mixed with local light to obtain an IF signal. In the cold start control, the frequency of the local light and/or the frequency of the signal light is swept in the state of the system capable of detecting the IF signal and discrimination between the real/image states and relative correction are made, and then, an AFC operation is started.
REFERENCES:
patent: 5191614 (1993-03-01), LeCong
patent: 5223967 (1993-06-01), Udd
"Carrier Acquisition and Tracking for Coherent Systems," T. Large et al., IEE Colloquium on Coherent Optical Communications, Jun. 27, 1990, London, pp. 12/1-12/7.
"Tunable Optical Heterodyne Receiver for Coherent FDM Broadcasting Systems," S. Yamazaki et al., 14th European Conference on Optical Communication, Sep. 1988, Brighton, G.B., pp. 86-89.
Miyata Hideyuki
Naito Takao
Onaka Hiroshi
Fujitsu Limited
Olms Douglas W.
Ton Dang
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