Dynamic EDFA gain-flattening filter using two LPFGs with divided coil heaters

被引：15
作者：
Bae, JK [1 ]
Bae, JH
Kim, SH
Park, N
Lee, SB
机构：
[1] Korea Inst Sci & Technol, Photon Res Ctr, Seoul 130791, South Korea
[2] Seoul Natl Univ, Sch Elect Engn & Comp Sci, Opt Commun Syst Lab, Seoul 151744, South Korea
[3] Cheju Natl Univ, Coll Ocean Sci, Cheju 690756, South Korea
来源：
IEEE PHOTONICS TECHNOLOGY LETTERS | 2005年 / 17卷 / 06期
关键词：
band-rejection filter; divided heater; long-period fiber gratings (LPFGs); tunable;
D O I：
10.1109/LPT.2005.847439
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We introduce a new type of dynamic erbium-doped fiber amplifier (EDFA) gain-flattening filter using two long-period fiber gratings (LPFGs) equipped with divided coil-heaters. By individually controlling each of the 64 segments of coil heaters over the grating, we adjusted the temperature distribution of LPFGs piecewise-uniformly, thus, to maintain optimum gain-flatness for different EDFA operation conditions. By controlling the different cladding modes for each LPFGs, we also achieve enhanced controllability/flexibility for the filter spectrum of dynamic LPFG. Wide dynamic-range gain/power control with less than 0.8-dB signal ripples, over 30 nm was demonstrated.
引用
收藏
页码：1226 / 1228
页数：3
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