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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 38, Iss. 15 — Aug. 1, 2013
  • pp: 2669–2672

Influence of the waist diameters on transmission characteristics and strain sensitivity of microtapered long-period fiber gratings

Min-Seok Yoon, Hyun-Joo Kim, Sung-Jae Kim, and Young-Geun Han  »View Author Affiliations


Optics Letters, Vol. 38, Issue 15, pp. 2669-2672 (2013)
http://dx.doi.org/10.1364/OL.38.002669


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Abstract

Transmission characteristics of microtapered long-period fiber gratings (MTLPGs) and their strain and temperature sensitivities with variations in the waist diameters are investigated theoretically and experimentally. Transmission characteristics of MTLPGs strongly depend on the waist diameter of the tapered optical fiber (TOF) because of the modification of the effective index difference between the core and the cladding modes. Based on the photoelastic effect, the resonant wavelengths of MTLPGs with variations in strain shift to shorter wavelengths. The strain sensitivity of the MTLPG with a waist diameter of 25 μm is improved by a factor of 20 compared with that of a 125 μm long-period fiber grating. The temperature sensitivities of MTLPGs are also enhanced by reducing the waist diameter of the TOF.

© 2013 Optical Society of America

OCIS Codes
(050.2770) Diffraction and gratings : Gratings
(060.2310) Fiber optics and optical communications : Fiber optics
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(230.3990) Optical devices : Micro-optical devices

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: May 16, 2013
Revised Manuscript: June 24, 2013
Manuscript Accepted: June 26, 2013
Published: July 22, 2013

Citation
Min-Seok Yoon, Hyun-Joo Kim, Sung-Jae Kim, and Young-Geun Han, "Influence of the waist diameters on transmission characteristics and strain sensitivity of microtapered long-period fiber gratings," Opt. Lett. 38, 2669-2672 (2013)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-38-15-2669


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