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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 18 — Aug. 31, 2009
  • pp: 15502–15507

Twin core photonic crystal fiber for in-line Mach-Zehnder interferometric sensing applications

Bongkyun Kim, Tae-Hoon Kim, Long Cui, and Youngjoo Chung  »View Author Affiliations

Optics Express, Vol. 17, Issue 18, pp. 15502-15507 (2009)

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We will discuss fabrication of twin core photonic crystal fiber (TC-PCF) using the stack-and-draw method and its application for in-line Mach-Zehnder interferometers. The small difference in the effective indexes of the two core modes leads to interference fringes and the birefringence of the twin cores results in polarization-dependent fringe spacing. The strain sensitivity was negative and wavelength-dependent. A novel intensity-based bend sensor is also demonstrated with bend-induced spatial fringe shift. High air filling fraction of fabricated TC-PCF cladding provides immunity to bend-induced intensity fluctuation.

© 2009 OSA

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(060.5295) Fiber optics and optical communications : Photonic crystal fibers

ToC Category:
Photonic Crystal Fibers

Original Manuscript: July 21, 2009
Revised Manuscript: August 13, 2009
Manuscript Accepted: August 16, 2009
Published: August 18, 2009

Bongkyun Kim, Tae-Hoon Kim, Long Cui, and Youngjoo Chung, "Twin core photonic crystal fiber for in-line
Mach-Zehnder interferometric sensing applications," Opt. Express 17, 15502-15507 (2009)

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