Bidirectional optical amplifier having flat gain

Details Bidirectional optical amplifier having flat gain Bidirectional optical amplifier having flat gain

1997-07-18

1999-03-23

Ullah, Akm E.

Optical waveguides

With optical coupler

Plural

G02N 628

Patent

active

058870911

ABSTRACT:
A bidirectionally amplifying rare earth doped fiber optical amplifier having an equalized gain at multiple wavelengths is disclosed for use in dense wavelength multiplexed bidirectional fiber transmission applications. In a first embodiment, a four port circulator is utilized with two amplifying fibers; one for each direction of propagation and a multiplicity of gratings configured to equalize the gain at the different wavelengths. Different embodiments utilizing three port and four port circulators are utilized. A more general amplifier device with equal gain at multiple wavelengths is disclosed.

REFERENCES:
patent: 5039199 (1991-08-01), Mollenauer et al.
patent: 5050949 (1991-09-01), DiGiovanni et al.
patent: 5557442 (1996-09-01), Huber
patent: 5563733 (1996-10-01), Mitsuda et al.
patent: 5604627 (1997-02-01), Kohn
patent: 5633741 (1997-05-01), Giles

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