Title :
Dynamic erbium-doped fiber amplifier based on active gain flattening with fiber acoustooptic tunable filters
Author :
Yun, Seok Hyun ; Lee, Bong Wan ; Kim, Hyang Kyun ; Kim, Byoung Yoon
Author_Institution :
Dept. of Phys., Korea Adv. Inst. of Sci. & Technol., Taejon, South Korea
Abstract :
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.
Keywords :
acousto-optical filters; erbium; optical communication equipment; optical fibre amplifiers; optical fibre filters; optical tuning; wavelength division multiplexing; active gain equalizing filters; active gain flattening; all-fiber acoustooptic tunable fibre filters; automatic feedback control; cascaded structures; controllable filter shape generation; dynamic erbium-doped fiber amplifier; dynamic-range gain/power control; e dynamic EDFA; erbium-doped fiber amplifier; fiber acoustooptic tunable filters; numerical simulation; operating conditions; signal ripple; Computerized monitoring; Erbium-doped fiber amplifier; Feedback control; Optical attenuators; Optical control; Optical feedback; Optical filters; Optical network units; Optical pumping; Power control;
Journal_Title :
Photonics Technology Letters, IEEE
