23 February 2018 High-efficiency power transfer for silicon-based photonic devices
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We demonstrate an efficient coupling of guided light of 1550 nm from a standard single-mode optical fiber to a silicon waveguide using the finite-difference time-domain method and propose a fabrication method of tapered optical fibers for efficient power transfer to silicon-based photonic integrated circuits. Adiabatically-varying fiber core diameters with a small tapering angle can be obtained using the tube etching method with hydrofluoric acid and standard single-mode fibers covered by plastic jackets. The optical power transmission of the fundamental HE11 and TE-like modes between the fiber tapers and the inversely-tapered silicon waveguides was calculated with the finite-difference time-domain method to be more than 99% at a wavelength of 1550 nm. The proposed method for adiabatic fiber tapering can be applied in quantum optics, silicon-based photonic integrated circuits, and nanophotonics. Furthermore, efficient coupling within the telecommunication C-band is a promising approach for quantum networks in the future.
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Gyeongho Son, Gyeongho Son, Kyoungsik Yu, Kyoungsik Yu, } "High-efficiency power transfer for silicon-based photonic devices", Proc. SPIE 10526, Physics and Simulation of Optoelectronic Devices XXVI, 1052616 (23 February 2018); doi: 10.1117/12.2287570; https://doi.org/10.1117/12.2287570

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