Step-changed long-period fiber gratings

Bai Ou Guan, Aping Zhang, Hwa Yaw Tam, Helen L W Chan, Chung Loong Choy, Xiaoming Tao, Muhtesem Süleyman Demokan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

29 Citations (Scopus)


The spectral characteristics of a new type of long-period grating (LPG) structure, step-changed LPG, are investigated theoretically and experimentally. It is shown that the spectral profile of such gratings can be tailored by adjusting the step parameters. A good agreement between simulated results and measured spectra is obtained. This type of LPG has potential applications in gain flattening of erbium-doped fiber amplifiers.
Original languageEnglish
Pages (from-to)657-659
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number5
Publication statusPublished - 1 May 2002


  • Band-rejection filters
  • Gain flattening
  • Long-period gratings
  • Mode coupling
  • Optical fiber filters

ASJC Scopus subject areas

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


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