Abstract
A practical hollow-core photonic crystal fiber design suitable for
attaining low-loss propagation is analyzed. The geometry involves a number
of localized elliptical features positioned on the glass ring that surrounds the
air core and separates the core and cladding regions. The size of each
feature is tuned so that the composite core-surround geometry is
antiresonant within the cladding band gap, thus minimizing the guided
mode field intensity both within the fiber material and at material / air
interfaces. A birefringent design, which involves a 2-fold symmetric
arrangement of the features on the core-surround ring, gives rise to
wavelength ranges where the effective index difference between the
polarization modes is larger than 10-4. At such high birefringence levels, one
of the polarization modes retains favorable field exclusion characteristics,
thus enabling low-loss propagation of this polarization channel.
Original language | English |
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Journal | Optics Express |
Volume | 14 |
Issue number | 16 |
Pages (from-to) | 7329-7341 |
ISSN | 1094-4087 |
DOIs | |
Publication status | Published - 2006 |