Long-period fiber gratings in twisted single-mode fibers written by high-frequency CO2 laser pulses

Research output: Chapters, Conference Papers, Creative and Literary Works (RGC: 12, 32, 41, 45)32_Refereed conference paper (with ISBN/ISSN)

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Detail(s)

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Volume7503
Publication statusPublished - 2009

Publication series

Name
Volume7503
ISSN (Print)0277-786X

Conference

Title20th International Conference on Optical Fibre Sensors
PlaceUnited Kingdom
CityEdinburgh
Period5 - 9 October 2009

Abstract

We discover that the rejection band of a long-period fiber grating written in a twisted single-mode fiber by a CO2 laser can split into two, when the twist applied to the fiber is relaxed after the writing of the grating. The wavelength split increases with the twist rate and the effect is independent of the polarization state of light. We attribute the observed phenomenon to the presence of a rotary frozen-in torsion stress along the fiber. Such a grating could find applications as a temperature-insensitive torsion sensor. © 2009 SPIE.

Research Area(s)

  • Beat Frequency, Long Period Fiber Gratings, Optical Fiber Devices, Optical Fiber Sensing

Citation Format(s)

Long-period fiber gratings in twisted single-mode fibers written by high-frequency CO2 laser pulses. / Zhu, Tao; Rao, Yun-Jiang Rao; Chiang, King Seng; Shi, Cuihua; Liu, Min.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 7503 2009. 75037N.

Research output: Chapters, Conference Papers, Creative and Literary Works (RGC: 12, 32, 41, 45)32_Refereed conference paper (with ISBN/ISSN)