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3 March 2020 Hundreds of meter-long low-loss silicon-core optical fiber
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Proceedings Volume 11276, Optical Components and Materials XVII; 112760W (2020)
Event: SPIE OPTO, 2020, San Francisco, California, United States
Hybrid optical fibers, i.e. optical fibers that combine, in the same structure, glass with crystal, metal, polymer or a second type of glass, open access to a wide range of optical properties or optical functions not accessible to common single-glass-made optical fibers. Silicon-core fibers are one type of hybrid fibers that have been intensively studied since 2006 with the aim to take benefit of the mid-infrared transparency of silicon or to implement opto-electrical functions in the optical fiber itself. Some of the unique optical properties of these semiconductor-core fibers have been demonstrated but it is admitted that optical losses are still today a drag on the rise of performances and hence devote specific attention. Post-processing based on laser or thermal annealing can be applied on the as-drawn fibers to improve core crystallinity and then reduce optical losses. However, such processing techniques have been demonstrated on centimeter-long fibers only. In the present paper, we demonstrate as-drawn silicon-core fiber with loss level below 0.2 dB/cm on the 1250-1650nm wavelength range, this fiber being continuously manufactured over length exceeding one hundred of meters. Several fibers have been fabricated from a rod-in-stack approach and different core dimensions ranging from about 0.8 to 3.4 μm have been successively realized and extensive characterizations (XRD, micro-Raman spectroscopy, TEM and ToF-SIMS analysis) have been conducted on the 3.4 μm core fiber. The crystalline state of the core, the absence of oxygen contamination and the optical transmission from 1.1 to 4 μm will be presented.
© (2020) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Maryna Kudinova, Géraud Bouwmans, Rémi Habert, Stéphane Plus, Karen Baudelle, Rémy Bernard, Bertrand Chazallon, Andy Cassez, Hicham El Hamzaoui, Olivier Vanvincq, Johann Troles, and Laurent Bigot "Hundreds of meter-long low-loss silicon-core optical fiber", Proc. SPIE 11276, Optical Components and Materials XVII, 112760W (3 March 2020);


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