Kim, Gilhwan Cho, Taiyong Hwang, Kyujin Lee, Kwanil Lee, Kyung S. Lee, Sang Bae 2024-01-20T22:01:35Z 2024-01-20T22:01:35Z 2021-09-01 2009-02-02 1094-4087 https://pubs.kist.re.kr/handle/201004/132750 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 4.6 x 10(-2) at 1,550nm. (C) 2008 Optical Society of America English OPTICAL SOC AMER CRYSTAL FIBERS SURFACE-MODES BIREFRINGENCE FABRICATION Control of hollow-core photonic bandgap fiber ellipticity by induced lateral tension Article 10.1364/OE.17.001268 1 OPTICS EXPRESS, v.17, no.3, pp.1268 - 1273 OPTICS EXPRESS 17 3 1268 1273 scie scopus 000263432400013 2-s2.0-59749103539 Optics Optics Article CRYSTAL FIBERS SURFACE-MODES BIREFRINGENCE FABRICATION