Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Patent
1986-03-20
1988-04-05
Orsino, Jr., Joseph A.
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
H04B 900
Patent
active
047364629
ABSTRACT:
A method and apparatus are disclosed for implementing an optical communication network wherein switchable information signals are retained in the optical mode. Sources of optical signals, destinations for optical signals, and intermediate photonic switches are interconnected by optical links, each link comprising two unidirectional transmission optical fibers. An optical bit stream generated at a source of optical signals comprises repetitive time frames. Each time frame includes a frame synchronizing signal and a plurality of signal groups of information bits separated in time by a route switching interval. The optical bit streams entering a photonic switch are frame synchronized. A particular group of information bits retains its position in time within a frame from the source of the optical signal to its destination. The photonic switch is set up during a route switching interval for transmission of a group of information bits from an input to an output of the photonic switch. Advantageously, in such a network optical signals need not be converted to electrical signals as they traverse communication links from a source to a destination.
REFERENCES:
patent: 3849604 (1974-11-01), Benes et al.
Ogiwara et al.-Optical Switching System Equipment-IEEE Trans. on Communications-vol. Com 27, #2, Feb. 1979, pp. 517-521.
S. Kobayashi et al., "Semiconductor Optical Amplifiers", IEEE Spectrum, vol. 21, No. 5, May 1984, pp. 26-33.
A. E. Joel, Jr., "On Permutation Switching Networks", The Bell System Technical Journal, vol. 47, 1968, pp. 813-822.
R. C. Alferness, "High-Speed Optical Switches for Single-Mode Lightwave Communications", IEEE Global Telecommunications Conference, (Atlanta), Nov. 26-29, 1984, pp. 874-877.
H. S. Hinton, "A Nonblocking Optical Interconnection Network Using Directional Couplers", IEEE Global Telecommunications Conference, (Atlanta), Nov. 26-29, 1984, pp. 885-889.
American Telephone and Telegraph Company AT&T Bell Laboratories
Orsino Jr. Joseph A.
Ulrich Werner
LandOfFree
Photonic switching does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Photonic switching, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photonic switching will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2239525