Bidirectional optical telecommunication system comprising a bidi

Details Bidirectional optical telecommunication system comprising a bidi Bidirectional optical telecommunication system comprising a bidi

1996-01-16

1999-11-30

Negash, Kinfe-Michael

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359113, 359341, 385 24, H04J 1402

Patent

active

059952598

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, said signals having a first and a second wavelength respectively, which are distinct from each other and included in said amplification wavelength band; two first and two second wavelength-selective optical couplers, having a first wavelength pass-band including said first wavelength and a second wavelength pass-band including said second wavelength respectively, said first and second wavelength pass-bands being devoid of relative overlappings, wherein said amplifying unit is connected between two opposite nodes of an optical bridge circuit, and wherein at the nodes of said bridge circuit said first and second selective optical couplers are present, in which said first and second selective couplers are disposed symmetrically to said amplifying unit and to said input/output ports of said optical signals.

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