Photonics Research, 2016, 4 (6): 06000209, Published Online: Dec. 23, 2016  

Design of a barcode-like waveguide nanostructurefor efficient chip–fiber coupling Download: 1119次

Author Affiliations
Department of Electronic and Information Engineering, Harbin Institute of Technology, Shenzhen Graduate School, The University Town of Shenzhen, Xili, Shenzhen, China
Abstract
A barcode-like waveguide nanostructure with discretized multilevel pixel lines is designed and optimized by a nonlinear search algorithm. We obtain the design of a one-dimensional multilevel nanostructure with ?1.04 dB efficiency for surface normal coupling to a standard single-mode fiber. Another design is achieved from the automatic optimization process, which enables polarization-independent coupling to a single-mode fiber. The optimum coupling efficiency is simulated to be ?2.83 dB for TE and ?3.49 for TM polarization centered near the 1550 nm wavelength. Polarization-dependent loss of less than 1 dB over 45.3 nm is achieved.

Xiang Wen, Ke Xu, Qinghai Song. Design of a barcode-like waveguide nanostructurefor efficient chip–fiber coupling[J]. Photonics Research, 2016, 4(6): 06000209.

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