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Effect of Vortex Order on Helical-Phased Donut Mode Launch in Multimode Fiber

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Optical fiber sensors based on mode division multiplexing (MDM) play an increasingly vital role for real-time multi-parameter measurements. For multimode fibers, the central core region typically has defects in the refractive index profile, thus limiting the stability of lower-order modes for MDM. To avoid the central core region, this paper introduces a new launch based on helical-phased ring modes in multimode fiber using a vertical-cavity surface-emitting laser (VCSEL) array and a vortex lens. A data rate of 14 Gbit/s for a multimode fiber length of 1200 meters is achieved at a wavelength of 1550.12 nm. The transverse electric field, power coupling coefficients and eye diagrams are analyzed.
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Keywords: Data Center; Donut Mode; Mode Division Multiplexing; Multimode Fiber; Optical Interconnects; Spiral Phase Front

Document Type: Research Article

Affiliations: 1: Integrated Optics Group, School of Computing, Universiti Utara Malaysia, Sintok, Kedah, Malaysia 2: Computer Science and Engineering Department, College of Engineering, Qatar University, Doha, Qatar

Publication date: 2015-10-01

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