Mr. Sho Yakabe Profile

Sho Yakabe

at Sumitomo Electric Industries Ltd

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Proceedings Article | 5 March 2022 Presentation + Paper

Single-mode polymer waveguide for fan-in/fan-out of multicore fiber by the mosquito method

Sho Yakabe, Takaaki Ishigure

Proceedings Volume 12007, 120070A (2022) https://doi.org/10.1117/12.2614365

KEYWORDS: Waveguides, Single mode fibers, Cladding, Polymers, Polymer multimode waveguides, Connectors, Optical fibers

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In this paper, in order to apply to optical connection components such as fan-in-fan-out (FIFO) devices for multicore fibers (MCFs), we design polymer optical waveguides with circular cores satisfying the single-mode condition, which are fabricated using the Mosquito method, and experimentally demonstrate that the optimum S-shape bent core waveguide can be fabricated as designed. The Mosquito method is a technique we have developed to form circular cores in both multimode and single-mode waveguides using a commercially available microdispenser and multi-axis syringe scanning robot. We have demonstrated that single-mode waveguides fabricated by the Mosquito method can be coupled with SMF with low loss. However, in order to realize a waveguide type FIFO device for MCFs by the Mosquito method, it is necessary to maintain micron-order positioning accuracy for the cores while three dimensionally aligning multiple cores in FIFO patterns. Since the pitch between the cores on the MCF side is very narrow, the core position is likely to deviate from the design value due to the liquid monomer flow caused by needle scan. We statistically confirm the possible amount of deviation from the design position by needle scan and feed it back to the program of needle scan path for the FIFO. We successfully fabricate a four-core FIFO with a desired core pitch. It is experimentally confirmed that the insertion loss is 1.4 dB on average. From these investigations, we confirm that the Mosquito method has an ability to fabricate small and low-loss FIFO devices.

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