Highly birefringent optical microfibers

Haifeng Xuan, Jian Ju, Wei Jin

Research output: Journal article publicationJournal articleAcademic researchpeer-review

81 Citations (Scopus)


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.
Original languageEnglish
Pages (from-to)3828-3839
Number of pages12
JournalOptics Express
Issue number4
Publication statusPublished - 15 Feb 2010

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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