Bidirectional optical transmission system

Details Bidirectional optical transmission system Bidirectional optical transmission system

1994-12-14

1996-11-05

Lee, John D.

Optical waveguides

With optical coupler

Plural

385 46, 385 7, 359119, 359118, G02B 628

Patent

active

055726127

ABSTRACT:
Bidirectional transmission over a single optical fiber is obtained in an optical communications system by using a three port circulator in customer premises equipment together with an optical fiber amplifier and a narrow band filter. The fiber amplifier can be locally or remotely pumped. The acousto-optic modulator is advantageously used because it reduces the coherent Rayleigh noise by detuning upstream and downstream wavelengths.

REFERENCES:
patent: 5140655 (1992-08-01), Bergmann et al.
patent: 5214728 (1993-05-01), Shigematsu et al.
patent: 5280549 (1994-01-01), Barnard et al.
patent: 5388172 (1995-02-01), Anderson
"Amplifying Fibre LAN's", Proceedings IEEE/LOS Optical Multi-Access Networks, paper PD2, Jul. 1990.
"Optical Ring Networks with Distributed Amplification", IEEE Photonics Technology Letters, vol. 3, No. 4, Apr. 1991, Evan Goldstein, pp. 390-393.
"A PON Architecture With Single Optical Carrier Bidirectional Transmissions", 4th Workshop on Optical Local Networks, Sep. 24 and 25, 1993, Versailles, France.
"Simultaneous Bit Rate Independent Bidirectional Data Transmission On A Single Optical Carrier For PON Applications", ECOC '92, Perrier et al., Berlin, Germany, Sep. 1992.

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