Stitched long-period fiber gratings for gain-flattening of broadband EDFAs

Xue Wen Chen, Aping Zhang, Sailing He, Hwa Yaw Tam

Research output: Journal article publicationConference articleAcademic researchpeer-review


In this paper, we report the optimal designs of stitched long-period fiber gratings (SLPGs) for gain-flattening of broadband erbium-doped fiber amplifiers (EDFAs) by using the genetic algorithm. Two measured gain spectra with bandwidth of 50nm and 80nm have been flattened within ±0.64dB and ±0.73dB, respectively, by using optimally designed SLPG devices. Such an SLPG device possesses not only a flexible spectrum-shaping capability, but also a simple index-modulation profile suitable for practical implementation. The point-by-point grating writing technique is employed to demonstrate the fabrication of the designed SLPG filters.
Original languageEnglish
Article number170
Pages (from-to)1021-1028
Number of pages8
JournalProceedings of SPIE - The International Society for Optical Engineering
Issue numberPART 2
Publication statusPublished - 1 Dec 2004
EventPassive Components and Fiber-based Devices - Beijing, China
Duration: 9 Nov 200411 Nov 2004


  • Erbium-doped fiber amplifier
  • Gain flattening
  • Genetic algorithm
  • Long-period fiber gratings

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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