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Optics Letters

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  • Vol. 36, Iss. 5 — Mar. 1, 2011
  • pp: 636–638

Fiber in-line Mach–Zehnder interferometer constructed by selective infiltration of two air holes in photonic crystal fiber

M. Yang, D. N. Wang, Y. Wang, and C. R. Liao  »View Author Affiliations


Optics Letters, Vol. 36, Issue 5, pp. 636-638 (2011)
http://dx.doi.org/10.1364/OL.36.000636


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Abstract

A fiber in-line Mach–Zehnder interferometer is fabricated through selective infiltrating of two adjacent air holes of the innermost layer in the solid core photonic crystal fiber, assisted by femtosecond laser micromachining. The liquid infiltrated has higher refractive index than that of the background silica, and, hence, the two rods created can support a guide mode with lower effective refractive index than that of silica. The interference is produced by the fiber fundamental mode and the guide mode. The free spectral range (FSR) of the interferometer is found to be dependent on the photonic crystal fiber length, and a large FSR corresponds to a short photonic crystal fiber length. Such an interferometer device is robust and exhibits extremely high temperature sensitivity ( 7.3 nm / ° C for the photonic crystal fiber length of 3.4 cm ) and flexible operation capability.

© 2011 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(320.7140) Ultrafast optics : Ultrafast processes in fibers
(060.5295) Fiber optics and optical communications : Photonic crystal fibers

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: December 7, 2010
Revised Manuscript: January 24, 2011
Manuscript Accepted: January 25, 2011
Published: February 18, 2011

Citation
M. Yang, D. N. Wang, Y. Wang, and C. R. Liao, "Fiber in-line Mach–Zehnder interferometer constructed by selective infiltration of two air holes in photonic crystal fiber," Opt. Lett. 36, 636-638 (2011)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-36-5-636

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