title: Embedded multicore hollow fiber with high birefringence.
abstract: We fabricate and demonstrate a hollow fiber with multiple embedded cores (MCHF) based on a modified "suspended core-in-tube" preform technique. Its birefringence properties are controlled by the MCHF core's ovality, which could be controlled by the applied pressure and drawing temperature in the MCHF preform. An in-fiber Mach-Zehnder interferometer with 90.38% visibility is built by fuse-tapering a single-mode fiber to the MCHF, and the splice loss is less than 2 dB. We expect that the proposed MCHF has some potential applications in in-fiber interferometers without the polarization-induced fading problem and in the biosensing area.
authors: Photonics Research Center, School of Science, Harbin Engineering University, China.
authors: Fengjun
authors: F
authors: Tian
authors: Libo
authors: L
authors: Yuan
authors: Qiang
authors: Q
authors: Dai
authors: Zhihai
authors: Z
authors: Liu