Full duplex lightwave communication system

Details Full duplex lightwave communication system Full duplex lightwave communication system

1989-02-08

1990-11-20

Orsino, Joseph A.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455607, 455611, 372 38, G02F 200, H01S 300, H04B 1000

Patent

active

049725149

ABSTRACT:
Full duplex operation is achieved in a lightwave communication system by employing terminals having a distributed Bragg reflector (DBR) laser having separate electrically controllable Bragg reflector and gain sections. While operating as the basic heterodyne reception element, the DBR laser simultaneously generates lightwave signals for transmission to other terminals. External circuits process the electrical (intermediate frequency) signals from the simultaneously modulated and signal mixing laser to extract received information. In one embodiment, full duplex operation is described for an FSK lightwave communication system.

REFERENCES:
patent: 4824201 (1989-04-01), Kazovsky
patent: 4860294 (1989-08-01), Winzer et al.
patent: 4882771 (1989-11-01), Rocks
R. F. Kazarinov et al., Sov. Physc.-JETP, vol. 39, No. 3, Sep. 1974 "Heterodyne Reception of Light by an Injection Laser", pp. 522-527.

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