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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 4 — Feb. 15, 2010
  • pp: 3828–3839

Highly birefringent optical microfibers

Haifeng Xuan, Jian Ju, and Wei Jin  »View Author Affiliations

Optics Express, Vol. 18, Issue 4, pp. 3828-3839 (2010)

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Highly birefringent (Hi-Bi) air-clad silica microfibers (MFs) with wavelength and sub-wavelength scale transverse dimensions are studied theoretically and experimentally. Hi-Bi MFs are taper-drawn from the standard SMF-28 single mode fibers that are “pre-processed” by “cutting away” parts of the silica cladding on opposite sides of the fiber with a femtosecond infrared laser. Such Hi-Bi MFs have approximately elliptical cross-sections and are approximated by a three-layer model comprising a small central Ge-doped region surrounded by an elliptical silica region and an air-cladding. Theoretical modeling shows that phase and group birefringence of the order 10−2 can be achieved with such air-clad Hi-Bi MFs. Experiments with an air-clad elliptical fiber with a major diameter of 0.9μm and a minor/major diameter ratio of 0.9 demonstrated a group birefringence of ~ 0.015, agreeing well with the theoretical predictions. The Hi-Bi MFs are useful for micron/nanoscale polarization maintaining transmission and phase-sensitive interferometric sensors.

© 2010 OSA

OCIS Codes
(060.2280) Fiber optics and optical communications : Fiber design and fabrication
(060.2310) Fiber optics and optical communications : Fiber optics
(060.2420) Fiber optics and optical communications : Fibers, polarization-maintaining
(230.3990) Optical devices : Micro-optical devices

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: November 13, 2009
Revised Manuscript: December 18, 2009
Manuscript Accepted: December 21, 2009
Published: February 11, 2010

Haifeng Xuan, Jian Ju, and Wei Jin, "Highly birefringent optical microfibers," Opt. Express 18, 3828-3839 (2010)

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