Abstract
A new type of gain flattening filter for amplified spontaneous emission (ASE) source based on erbium doped fiber (EDF) is proposed and demonstrated by fabricating and writing two series ultra-long period fiber grating (ULPFG) on single mode fiber (SMF-28). The novelty method in this research is based on writing the two ULPFGs as fat gratings. The LPG is written by a simple and available arc-discharge method. The pump power based on single-pass backward pump configuration is around 100 mW, and the average wavelength is near to 974 nm. The gain flattening profile is obtained by 3.4 (±1.7) dB ripple in the wavelength range between 1524 nm and 1565 nm with 41-nm band width.
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Nafchi, F.M., Shahi, S., Shaffaatifar, M.T. et al. Novelty design in gain flattening filter of ASE source based on fat ultra-long period fiber grating. Photonic Sens 6, 243–248 (2016). https://doi.org/10.1007/s13320-016-0314-z
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DOI: https://doi.org/10.1007/s13320-016-0314-z