Journal
JOURNAL OF LIGHTWAVE TECHNOLOGY
Volume 22, Issue 8, Pages 1976-1986Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JLT.2004.832429
Keywords
erbium-doped fiber amplifier (EDFA); long-period fiber grating(LPFG); minimization technique; Monte Carlo simulations
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This paper proposes an accurate modeling technique of concatenated long-period fiber gratings (LPFGs). The proposed technique,is then applied to the synthesis of LPFGs for the erbium gain equalization using both the simulated annealing and the steepest descent minimization technique. A piecewise-uniform LPFG is theoretically synthesized according to the inverted gain spectrum of a commercially available erbium-doped fiber amplifier (EDFA) over the range of 1525-1570 nm. Sensitivity analysis of the designed structure is presented by Monte Carlo simulation with regard to the manufactured amplitude mask. To verify a synthesizing technique using the proposed modeling, the piecewise-uniform LPFGs for gain flattening of EDFA are fabricated and their spectra are also presented experimentally.
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