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Link-control gain clamping for a cascaded EDFAs link using differential ASE monitor

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4 Author(s)
Hosung Yoon ; Opt. Commun. Syst. Lab., Seoul Nat. Univ., South Korea ; Jaehyoung Park ; Ahn, Seong Joon ; Namkyoo Park

We propose a novel scheme for the suppression of gain excursion in a cascaded erbium-doped fiber amplifiers (EDFAs) link. By applying the differential amplified spontaneous emission monitoring method on link-control gain clamping, it is possible to achieve gain clamping for the whole link irrespectively of the control-signal wavelength and characteristics of individual amplifiers. The suggested algorithm/circuitry does not require predefinition of the injected signal power and operates independently of the wavelengths of control/data signals to the EDFA, enabling its application to different amplified links under distinct design parameters.

Published in:

Photonics Technology Letters, IEEE  (Volume:12 ,  Issue: 10 )