Dynamic gain and output power control in a gain-flattened erbium-doped fiber amplifier

We demonstrate an erbium-doped fiber amplifier (EDFA) that has a flat-gain spectrum over an 18-nm band and a constant per-channel output power regardless of the input powers and the number of channels. The gain flatness and the constant output are obtained by changing the laser diode pump power and...

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Bibliographic Details
Published in:	IEEE photonics technology letters Vol. 10; no. 6; pp. 787 - 789
Main Authors:	Park, Seo Yeon, Kim, Hyang Kyun, Lyu, Gap Yeol, Kang, Sun Mo, Shin, Sang-Yung
Format:	Journal Article
Language:	English
Published:	IEEE 01-06-1998
Subjects:	Arrayed waveguide gratings Circuits Erbium-doped fiber amplifier Fiber nonlinear optics Optical attenuators Optical filters Optical losses Optical pumping Power amplifiers Power generation
Online Access:	Get full text
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Summary:	We demonstrate an erbium-doped fiber amplifier (EDFA) that has a flat-gain spectrum over an 18-nm band and a constant per-channel output power regardless of the input powers and the number of channels. The gain flatness and the constant output are obtained by changing the laser diode pump power and the attenuation of the voltage-controlled attenuator (VCA) dynamically. The response times of pump control circuit and attenuator control circuit are 650 ns and 9 ms, respectively. The power excursion of surviving channel in an EDFA with fast control circuit is /spl sim/1% of that without fast control circuit when channels are added or dropped.
Bibliography:	ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23
ISSN:	1041-1135 1941-0174
DOI:	10.1109/68.681484