Control of hollow-core photonic bandgap fiber ellipticity by induced lateral tension
- Control of hollow-core photonic bandgap fiber ellipticity by induced lateral tension
- 김길환; 조태용; 황규진; 이관일; 이경식; 이상배
- Issue Date
- Optics express
- VOL 17, NO 3, 1268-1273
- We describe the fabrication of elliptical hollow-core photonic
bandgap fibers (EC-PBGFs). It was shown that the aspect ratio of the
hollow core can be controlled by tuning the negative pressure in the space
between the intermediate preform cane and outer jacketing tube, and by
placing this preform assembly off-center in the furnace, resulting in lateral
tension during the final draw. Modal birefringences of fabricated PBGFs
with different aspect ratio were measured using a Sagnac loop
interferometer. For the elliptical hollow core PBGF with aspect ratio of 2.34,
the modal birefringence was measured to be about 4.6ｘ10-2 at 1,550nm.
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