Recent development on CO2-laser written long-period fiber gratings

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)22_Publication in policy or professional journal

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Original languageEnglish
Article number713437
Journal / PublicationProceedings of SPIE - The International Society for Optical Engineering
Publication statusPublished - 2008


TitlePassive Components and Fiber-based Devices V
Period27 - 30 October 2008


The paper reviews the recent progress on CO2-laser writing of long-period fiber gratings (LPFGs) in different kinds of fibers, including conventional single-mode fiber (SMF), boron-doped SMF, polarization-maintaining fiber, photonic crystal fiber, and polarization-maintaining photonic crystal fiber. In particular, we report the writing dynamics for the understanding of the physical mechanisms involved in the writing process and show that the CO2-laser pulses can not only relax the internal stress in the fiber core but also induce a frozen-in stress in the cladding of the fiber under tension. The applications of CO2-laser written LPFGs, especially for the realization of broadband optical couplers, are also discussed. © 2008 SPIE.

Research Area(s)

  • Boron-doped fiber, Co2 laser, Frozen-in viscoelasticity, Glass structure change, Long-period fiber grating (LPFG), Optical coupler, Photonic crystal fiber, Polarization-maintaining fiber, Residual stress relaxation