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Dynamic erbium-doped fiber amplifier based on active gain flattening with fiber acoustooptic tunable filters

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4 Author(s)
Seok Hyun Yun ; Dept. of Phys., Korea Adv. Inst. of Sci. & Technol., Taejon, South Korea ; Bong Wan Lee ; Hyang Kyun Kim ; Byoung Yoon Kim

We describe the first demonstration of a dynamic erbium-doped fiber amplifier (EDFA) based on automatic feedback control of active gain equalizing filters. The filters are all-fiber acoustooptic tunable filters capable of generating controllable filter shapes. Wide dynamic-range gain/power control is achieved with <0.6-dB signal ripple over 30 nm in various operating conditions. We also show, by numerical simulation, an important advantage of the dynamic EDFA over a conventional EDFA in cascaded structures.

Published in:

Photonics Technology Letters, IEEE  (Volume:11 ,  Issue: 10 )