Title :
Optimization of step-changed long-period gratings for gain-flattening of EDFAs
Author :
Zhang, A. Ping ; Chen, Xue-Wen ; Guan, Zu-Guang ; He, Sailing ; Tam, Hwa-Yaw ; Chung, Weng-Hong
Author_Institution :
Dept. of Opt. Eng., Zhejiang Univ., China
Abstract :
We report the use of the genetic algorithm to optimize the parameters of our previously proposed step-changed long-period gratings for gain-flattening of erbium-doped fiber amplifiers (EDFAs). The gain spectrum of an EDFA is flattened within ±0.35 dB over 30 nm through a suitable selection of the cladding mode and the optimization of the grating parameters. An amplitude-mask structure is proposed to simplify the fabrication process of the optimal grating structure.
Keywords :
diffraction gratings; erbium; genetic algorithms; optical fibre amplifiers; optical fibre cladding; optical fibre fabrication; optical filters; EDFA; amplitude-mask structure; cladding mode; erbium-doped fiber amplifiers; fabrication process; gain spectrum; gain-flattening; genetic algorithm; grating parameters; long-period gratings; optimization; step-changed gratings; Erbium-doped fiber amplifier; Fabrication; Fiber gratings; Filters; Genetic algorithms; Helium; Optical fiber devices; Optical fibers; Optimization methods; Power amplifiers; Band-rejection filters; erbium-doped fiber amplifier (EDFA); gain flattening; genetic algorithm; long-period fiber gratings (LPGs);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2004.836905
