Optimization and fabrication of stitched long-period gratings for gain flattening of ultrawide-band EDFAs

Aping Zhang, Xue Wen Chen, Jin Hua Yan, Zu Guang Guan, Sailing He, Hwa Yaw Tam

Research output: Journal article publicationJournal articleAcademic researchpeer-review

15 Citations (Scopus)


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.
Original languageEnglish
Pages (from-to)2559-2561
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number12
Publication statusPublished - 1 Dec 2005


  • Erbium-doped fiber amplifier (EDFA)
  • Gain flattening
  • Genetic algorithm (GA)
  • 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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