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Design and optimization of compact spot-size converters for silicon photonic devices
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Paper Abstract

The coupling between a silicon nanowire (NW) and a single mode fiber (SMF) is challenging. Design and optimization of compact spot-size converters (SSCs) for silicon photonics devices are presented by using numerically efficient and rigorous full-vectorial finite-element based approaches. The multi-Poly-Silicon layers based SSCs are proposed and optimized for the quasi-TE and quasi-TM polarizations sequentially. The coupling losses can be reduced to 2.72 and 2.45 dB for the quasi-TE and quasi-TM polarizations, respectively by using an eleven Poly-Si layers based SSC. A polarizationindependent SSC is also proposed based on the phase-matched multi-Poly-Silicon-layer and lower taper waveguide for both the quasi-TE and quasi-TM polarizations. Coupling to a lensed fiber with the radius of 2 μm, the optimized polarization-independent SSC is with the coupling losses of 0.34 and 0.25 dB for the quasi-TE and quasi-TM polarizations, respectively. The on-chip integrated SSC opens up the feasibility of a low cost passive aligned fiber-pigtailed electronicphotonics integrated circuits platform.

Paper Details

Date Published: 4 March 2019
PDF: 8 pages
Proc. SPIE 10922, Smart Photonic and Optoelectronic Integrated Circuits XXI, 109221R (4 March 2019); doi: 10.1117/12.2513193
Show Author Affiliations
B. M. Azizur Rahman, City, Univ. of London (United Kingdom)
Weifeng Jiang, Nanjing Univ. of Posts and Telecommunications (China)


Published in SPIE Proceedings Vol. 10922:
Smart Photonic and Optoelectronic Integrated Circuits XXI
Sailing He; El-Hang Lee, Editor(s)

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