Apodized long-period grating with low insertion loss

Xiufeng Yang, Xin Guo, Chao Lu, Cheng Tee Hiang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

8 Citations (Scopus)


The characteristics of an apodized long-period grating are studied experimentally and theoretically. It has no side-lobes and almost zero insertion loss in the pass band. Changing the dc and maximum ac index along the z direction of LPG can conveniently control wavelength and the value of peak loss. Suitable spectral profile of gain-flattening filter with low insertion loss is obtained by writing two or three consecutive apodized sub-gratings in one fiber with the different UV power level in the second exposure. The experiment results are in good agreement with the simulation results.
Original languageEnglish
Pages (from-to)283-286
Number of pages4
JournalMicrowave and Optical Technology Letters
Issue number4
Publication statusPublished - 20 Nov 2002
Externally publishedYes


  • Apodization
  • Gain-flattening filter
  • Long-period grating

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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