Optical waveguides – With optical coupler – Particular coupling function
Patent
1996-12-20
1998-09-22
Lee, John D.
Optical waveguides
With optical coupler
Particular coupling function
359127, 359337, 359341, 385 24, G02B 628
Patent
active
058127100
ABSTRACT:
A variable optical attenuator is provided at an input terminal of a rare-earth doped optical fiber. The variable optical attenuator attenuates a multiwavelength light under the control of an AGBC circuit. The rare-earth doped optical fiber, which is excited by an excitation light generated by a light source, amplifies the multiwavelength light output from the variable optical attenuator. An ALC circuit controls the light source in such a way that an average optical level of the multiwavelength light output from the rare-earth doped optical fiber is kept constant. The wavelength division multiplexing coupler selects two optical signals having different wavelengths from the multiwavelength light amplified by the rare-earth doped optical fiber. The AGBC circuit controls the attenuation of the variable optical attenuator in such a way that the above described two optical signal levels match each other.
REFERENCES:
patent: 5050949 (1991-09-01), DiGiovanni et al.
patent: 5225922 (1993-07-01), Chraplyvy et al.
patent: 5392154 (1995-02-01), Chang et al.
patent: 5541766 (1996-07-01), Mizrahi et al.
patent: 5600481 (1997-02-01), Nakabayashi
patent: 5636054 (1997-06-01), Artigaud et al.
Fujitsu Limited
Lee John D.
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