Optimization of slep-changed long-period gratings for gain-flattening of EDFAs

Aping Zhang, Xue Wen Chen, Zu Guang Guan, Sailing He, Hwa Yaw Tam, Weng Hong Chung

Research output: Journal article publicationJournal articleAcademic researchpeer-review

11 Citations (Scopus)


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.
Original languageEnglish
Pages (from-to)121-123
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number1
Publication statusPublished - 1 Jan 2005


  • Band-rejection filters
  • Erbium-doped fiber amplifier (EDFA)
  • Gain flattening
  • Genetic algorithm
  • Long-period fiber gratings (LPGs)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Atomic and Molecular Physics, and Optics
  • Physics and Astronomy (miscellaneous)


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