Bidirectional optical telecommunication system comprising a bidi

Optical: systems and elements – Deflection using a moving element – Using a periodically moving element

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359114, 359133, H04J 1402

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active

060184043

ABSTRACT:
A bidirectional optical amplifier, comprising a unidirectional optical amplifying unit having one amplification wavelength band; two input/output ports for at least two optical signals having opposite propagation directions, the signals having a first and a second wavelength respectively, which are distinct from each other and included in the amplification wavelength band; two first and two second wavelength-selective optical couplers, respectively having a first wavelength pass-band including said first wavelength and a second wavelength pass-band including said second wavelength, the first and second wavelength pass-bands being non-overlapping, wherein the amplifying unit is connected between two opposite nodes of an optical bridge circuit, and wherein at the nodes of said bridge circuit the first and second selective optical couplers are present and are disposed symmetrically with respect to the amplifying unit and to the input/output ports of the optical signals.

REFERENCES:
patent: 5365368 (1994-11-01), Hsu et al.
patent: 5633741 (1997-05-01), Giles
patent: 5742416 (1998-04-01), Mizrahi
J. Farre, E. B.o slashed.dtker, G. Jacobsen and K.E. Stubkjaer, Design of Bidirectional Communication Systems and Optical Amplifiers, IEEE Photonics Technology Letters, vol. 4, No. 4, Apr. 1993, pp. 425-427.

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