Multiplex communications – Wide area network – Packet switching
Patent
1987-01-28
1988-05-17
Masinick, Michael A.
Multiplex communications
Wide area network
Packet switching
455607, 455612, 350 9616, H04B 900, G02B 628
Patent
active
047455926
ABSTRACT:
The system comprises subscriber stations (1, 2) each comprising a semiconductor laser generator (4) provided with means (3, 5) for modulating its laser output by means of transmit signals and a heterodyned detection system consisting of a photoelectric receiver (15) optically coupled to a local oscillator (17), an exchange (32) comprising a computer (37) and dual cavity semiconductor laser transmitters (39) connected to the outputs (38) of the computer, a passive optical distributor (31), and optical fibers (16, 8) connecting the lasers (4) and receivers (15) of each station with the optical distributor (31), on the one hand, and the lasers (4) of each station to the exchange (32), on the other hand, the computer assigning an optical frequency for each requested call and the laser transmitters of the exchange being operable to lock the transmit optical frequency of the calling and the called station lasers (4, 104), via optical fiber lines (8), on the frequency assigned by the computer.
REFERENCES:
patent: 4330869 (1982-05-01), Robieux
patent: 4530084 (1985-07-01), Strebel et al.
IEEE Journal of Quantum Electronics, vol. QE-16, No. 9, Sep. 1980, "Injection Locking Characteristics of an AIGaAS Semiconductor Laser" by Kobayashi et al., pp. 915-917.
Electronics Letters, May 26, 1983, vol. 19, No. 11, pp. 15-16, "1.5 .mu.m Wavelength GalnAsP C.sup.3 Lasers: Single-Frequency Operation and Wideband Frequency Tuning" by Tsang et al.
Compagnie Generale D'Electricite
Masinick Michael A.
Telesz Jr. Andrew J.
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