Abstract
A fiber structure with a circularly polarizing property is proposed.
The fiber consists of a round core and a triple-lobe stress region in the
cladding, which is compatible with single-mode fibers, and it can be
fabricated using conventional metal chemical vapor deposition processes.
By coating a layer with a high-refractive index, the twist pitch required
for resonant coupling is increased to hundreds of micrometers, and the
mature pit-in-jacket drawing technique can be used. The polarization
filtering properties of the fabricated circularly polarizing fibers are
measured experimentally, showing high distinction ratios in a broad
frequency region.
© 2016 Chinese Laser Press
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