Multiplex communications – Wide area network – Packet switching
Patent
1989-07-18
1991-06-11
Eisenzopf, Reinhard J.
Multiplex communications
Wide area network
Packet switching
370 3, H04J 1400, H04J 1402
Patent
active
050238639
ABSTRACT:
An optical switching system receives an optical input signal which is a wavelength-division multiplexed and time-division multiplexed signal. The optical input signal is divided into time-division multiplexed optical signals in different wavelength regions and transferred within an optical data bus after being subjected to a predetermined process including a frequency shift. The optical signals in the different wavelength regions are extracted from the optical data bus using optical bandpass filters, and multiplexed into an output optical signal which is a wavelength-division multiplexed and time-division multiplexed signal after being subjected to a predetermined process including a frequency shift.
REFERENCES:
Odagawa et al., "All Optical Flip-Flop Operation of Bistable Laser Diode", Conference on Solid State Devices and Materials, Aug. 1988 Merely Shows an Example of an Optical Memory.
Kuno et al., "Study on the Wavelength-Switching Devices Using Bistable DFB Lasers", National Conference of Semiconductor/Materials Group of Electronics and Information Communication Society, 1987.
Kondo et al., "A Tunable Optical-Wavelength Conversion Laser with TM-Polarized Light Input", National Conference of Electronics and Information Communication Society, Fall 1988 show examples of Optical Frequency Shifters.
Tomita et al., "An Experiment on Ultra-High Speed Optical Memory Operation Using Bistable Laser Diode", National Conference of Electronics and Communication Society, 1985.
Tomita et al., "2 Gb/s Ultra High Speed Optical Memory Using a Bistable Laser Diode", National Conference of Electronics and Information Communication Society, 1987 relate to Optical Memories.
Kikushima et al., "Tunable Amplification Properties of LD", National Conference of Electronics and Communication Society, 1985.
Terakado et al., "Light Amplification Using Bistable Laser Diode", National Conference of Electronics and Communication Society, 1985 relate to Amplification of Optical signals.
Beek L. Van
Eisenzopf Reinhard J.
Fujitsu Limited
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