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A Dual Hollow Core Antiresonant Optical Fiber Coupler Based on a Highly Birefringent Structure-Numerical Design and Analysis
摘要： With the growing interest in hollow-core antiresonant fibers (HC-ARF), attributed to the development of their fabrication technology, the appearance of more sophisticated structures is understandable. One of the recently advancing concepts is that of dual hollow-core antiresonant fibers, which have the potential to be used as optical fiber couplers. In the following paper, a design of a dual hollow-core antiresonant fiber (DHC-ARF) acting as a polarization fiber coupler is presented. The structure is based on a highly birefringent hollow-core fiber design, which is proven to be a promising solution for the purpose of propagation of polarized signals. The design of an optimized DHC-ARF with asymmetrical cores is proposed, together with analysis of its essential coupling parameters, such as the extinction ratio, coupling length ratio, and coupling strength. The latter two for the x- and y-polarized signals were ~2 and 1, respectively, while the optical losses were below 0.3 dB/cm in the 1500–1700 nm transmission band.
关键词： hollow-core optical fiber couplers,polarization splitters,optical fiber design,optical fiber couplers,hollow-core antiresonant fibers
更新于2025-09-16 10:30:52
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[IEEE 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) - Munich, Germany (2019.6.23-2019.6.27)] 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) - Polarization Dependance Engineering of Chalcogenide Optical Fiber Couplers
摘要： Chalcogenide (ChG) glasses are well known as key materials for the fabrication of optical fiber components compatible with optical transmission in the mid-infrared. Recently, single-mode ChG optical fiber couplers (OFCs) have been proposed for broadband coupling as well as for wavelength multi/demultiplexing [1]. From silica fibers, it has been shown that a proper engineering of fused optical fiber couplers can lead to polarization beamsplitting [2]. Here, we explore the polarization properties of single-mode OFCs made out of ChG glass. We show that by an appropriate engineering of their aspect ratio, the polarization dependence of OFCs is adjusted from highly polarization dependent down to polarization independent.
关键词： mid-infrared,polarization dependence,aspect ratio,Chalcogenide glasses,optical fiber couplers
更新于2025-09-11 14:15:04