Fabrication of long-period gratings by femtosecond laser-induced filling of air-holes in photonic crystal fibers

Shujing Liu, Long Jin, Wei Jin, Yiping Wang, D. N. Wang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

9 Citations (Scopus)


A new method for fabricating long-period gratings (LPGs) in photonic crystal fibers (PCFs) is presented. A tightly focused femtosecond infrared laser beam scans across a PCF periodically, resulting in periodic filling of cladding air-holes through a micro-explosion and redeposition process and forming an LPG. Strong resonance of ∼26 dB has been demonstrated with a grating length of <5 mm. An annealed LPG demonstrated stable operation at 800 °C for over 30 h.
Original languageEnglish
Article number5570903
Pages (from-to)1635-1637
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number22
Publication statusPublished - 5 Nov 2010


  • Femtosecond laser micromachining
  • long-period grating (LPG)
  • optical fiber sensor
  • photonic crystal fiber (PCF)

ASJC Scopus subject areas

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

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