Highly-compact, temperature-insensitive phase-shifted and multiple phase-shifted long-period fiber gratings by use of a CO2laser

Y. Zhu, P. Shum, X. Chen, C. H. Tan, H. W. Bay, Chao Lu

Research output: Journal article publicationConference articleAcademic researchpeer-review


We demonstrate the first fabrication of highly-compact and temperature-insensitive phase-shifted and multiple phase-shifted long-period gratings using the focused pulses of CO2laser with point-by-point technique. By introducing the 3π/2, π, or π/2 phase shifts in the different location of the gratings with 480 μm of a period-length and total number about 16-21 periods, the symmetrical and asymmetrical pandpass filters based on those gratings can be obtained. The temperature sensitivity of formed g ratings is about 8.8 pm/0C at a temperature range of 230C - 1900C. Such fiber grating component could be used as an all-fiber oscillator in the laser cavity. Long-period gratings with different phase shifts are also investigated with various notches of resonance attenuations. All gratings fabricated are compactness to be packaged into the fiber-optic based devices.
Original languageEnglish
Article number155
Pages (from-to)816-821
Number of pages6
JournalProceedings of SPIE - The International Society for Optical Engineering
Issue numberPART 2
Publication statusPublished - 1 Dec 2004
Externally publishedYes
EventRIAO/OPTILAS 2004: 5th Iberoamerican Meeting on Optics, and 8th Latin American Meeting on Optics, Lasers, and their Applications; ICO Regional Meeting - Porlamar, Venezuela, Bolivarian Republic of
Duration: 3 Oct 20048 Oct 2004


  • CO laser 2
  • Fiber Bragg grating
  • Long-period gratings
  • Phase-shifted
  • Single-mode fiber

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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