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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 20 — Oct. 1, 2007
  • pp: 12866–12871

Bending sensitivity of long-period fiber gratings inscribed in holey fibers depending on an axial rotation angle

Young-Geun Han, Gilhwan Kim, Kwanil Lee, Sang Bae Lee, Chang Hyun Jeong, Chi Hwan Oh, and Hee Jeon Kang  »View Author Affiliations

Optics Express, Vol. 15, Issue 20, pp. 12866-12871 (2007)

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We discuss bending properties of a long-period fiber grating (LPFG) inscribed into a holey fiber (HF) depending on an axial rotation angle. High quality of the HF-based LPFG with a high extinction ratio of more than 20 dB is achieved. The proposed HF-based LPFG has bending insensitivity under a certain range of the bending curvature. As the bending curvature is higher than 4 m-1, the center wavelength of the grating is shifted into the shorter wavelength. Bending sensitivity of the HF-based LPFG is changed by an axial rotation angle, which shows its dependence on the rotational orientation. We measure the transmission characteristics of the HF-based LPFG with the ambient index change. The HF-based LPFG has ambient index insensitivity because of the air holes in the inner cladding.

© 2007 Optical Society of America

OCIS Codes
(060.2310) Fiber optics and optical communications : Fiber optics
(060.2370) Fiber optics and optical communications : Fiber optics sensors

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: August 9, 2007
Revised Manuscript: September 12, 2007
Manuscript Accepted: September 17, 2007
Published: September 21, 2007

Young-Geun Han, Gilhwan Kim, Kwanil Lee, Sang Bae Lee, Chang Hyun Jeong, Chi Hwan Oh, and Hee Jeon Kang, "Bending sensitivity of long-period fiber gratings inscribed in holey fibers depending on an axial rotation angle," Opt. Express 15, 12866-12871 (2007)

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