Long-period gratings fabrication using piano-convex microlens array

Shun Yee Litjt, Wai Sing Man, Hwa Yaw Tam, Bai Ou Guan, Muhtesem Suleyman Demokan

Research output: Journal article publicationJournal articleAcademic researchpeer-review


A low-cost technique using commercial UV grade silica fibers to construct microlens array that is suitable for mass-production of long-period gratings is reported. The growth rate of gratings fabricated using these arrays is much faster than the conventional amplitude masks. Our previous work had shown that this technique was 400% more efficient than the metal mask technique. Further improvement of this grating writing technique using plano-convex microlens array is reported in this paper. Under the same writing conditions, long-period gratings with absorption peaks of 1.5dB and 17dB were fabricated by using a microlens array and a plano-convex microlens array, respectively.
Original languageEnglish
Pages (from-to)444-447
Number of pages4
JournalIEICE Transactions on Electronics
Issue number3
Publication statusPublished - 1 Jan 2000


  • Amplitude mask
  • Fabrication
  • Long period gratings
  • Microlens array

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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