Title :
Optimization and fabrication of stitched long-period gratings for gain flattening of ultrawide-band EDFAs
Author :
Zhang, A. Ping ; Chen, Xue-Wen ; Yan, Jin-Hua ; Guan, Zu-Guang ; He, Sailing ; Tam, Hwa-Yaw
Author_Institution :
Dept. of Opt. Eng., Zhejiang Univ., China
Abstract :
We present the optimization and fabrication of the stitched long-period fiber gratings (SLPGs) for gain flattening of an ultrawide-band erbium-doped fiber amplifier (EDFA). With an improved genetic algorithm, the gain spectrum of a practical EDFA with bandwidth of 80 nm is flattened within ±0.69 dB by an optimized SLPG. Furthermore, the SLPG is designed specially for a point-by-point grating writing technique. A superior control of the fabrication procedure of the designed SLPG has been demonstrated in the experiment.
Keywords :
diffraction gratings; erbium; genetic algorithms; optical design techniques; optical fibre amplifiers; optical fibre fabrication; erbium-doped fiber amplifier; fiber gratings; gain flattening; gain spectrum; genetic algorithm; grating fabrication; grating optimization; point-by-point grating writing; stitched long-period gratings; ultrawide-band EDFA; Bandwidth; Erbium-doped fiber amplifier; Fabrication; Fiber gratings; Filters; Genetic algorithms; Helium; Optical fiber polarization; Process control; Writing; Erbium-doped fiber amplifier (EDFA); gain flattening; genetic algorithm (GA); long-period fiber gratings (LPGs);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2005.859148
