Multi-Poly-Silicon-Layer-Based Spot-Size Converter for Efficient Coupling Between Silicon Waveguide and Standard Single-Mode Fiber

Jiang, W., Kohli, N., Sun, X. & Rahman, B. M. (2016). Multi-Poly-Silicon-Layer-Based Spot-Size Converter for Efficient Coupling Between Silicon Waveguide and Standard Single-Mode Fiber. IEEE Photonics Journal, 8(3), doi: 10.1109/JPHOT.2016.2577594

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Abstract

A novel spot-size converter (SSC) incorporating a phase-matched polycrystalline-silicon (Poly-Si) multilayer is proposed and optimized for efficient nanophotonic coupling, which can be fabricated by using the complementary metal-oxide-semiconductor (CMOS) compatible process and can be directly integrated. An efficient algorithm, combining the rigorous H-field-based full-vectorial finite-element method and the least square boundary residual method, is developed for the design optimization of the SSC. The use of simple single-layer and multilayer Poly-Si-based SSCs is investigated, in which the coupling process and phase matching for isolated and composite waveguides are also carried out. The coupling loss can be reduced to 2.72 dB by using an 11-Poly-Si-layer-based SSC. The on-chip integrated SSC opens up the feasibility of a low-cost passive-aligned fiber-pigtailed electronic-photonic integrated-circuit (PIC) platform.

Item Type: Article
Additional Information: © 2016 IEEE. Translations and content mining are permitted for academic research only. Personal use is also permitted, but republication/redistribution requires IEEE permission. See http://www.ieee.org/publications_standards/publications/rights/index.html for more information.
Uncontrolled Keywords: Science & Technology; Technology; Physical Sciences; Engineering, Electrical & Electronic; Optics; Physics, Applied; Engineering; Physics; Silicon photonics; spot-size converter; multilayer; 2-DIMENSIONAL CONFINEMENT; OPTICAL INTERCONNECTS; GRATING COUPLER; PHOTONICS; PERFORMANCE; INTEGRATION; CIRCUITS; PLATFORM; DEVICES; LASER
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: School of Engineering & Mathematical Sciences > Engineering
URI: http://openaccess.city.ac.uk/id/eprint/16553

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