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Ultra-Broadband Mode Splitter Based on Phase Controlling of Bridged Subwavelength Grating

An ultra-broadband mode splitter is proposed based on the phase controlling of the bridged subwavelength grating (BSWG) waveguides. An asymmetric directional coupler composed of two BSWG waveguides with an identical waveguide-width but two different bridge-widths is introduced to split the TM 0 and TM 1 modes based on the mode-sensitive phase-matching condition. The proposed mode splitter is optimized by utilizing the 3D full-vectorial finite difference time domain method. The results indicate that the proposed mode splitter can achieve a compact coupling length of 5.75 μm, the insertion losses of 0.41 dB and 0.53 dB, and the mode crosstalks of −19.6 dB and −27.8 dB for the TM 0 and TM 1 modes, respectively. The broad bandwidths of 430 nm and 372 nm can be achieved with the mode crosstalk of ≤−15 dB for the TM 0 and TM 1 modes, respectively. The fabrication tolerances are also studied in detail. The proposed mode splitter could be employed for signal selection and routing in the mode division multiplexing networks.

Ketersediaan

Informasi Detail

Judul Seri

JOURNAL OF LIGHTWAVE TECHNOLOGY; Vol.38 No.8 April 15 2020

No. Panggil

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Penerbit

: .,

Deskripsi Fisik

p. 2414 - 2422

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

-

Edisi

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Subjek

SILICON PHOTONICS
MODE DIVISION MULTIPLEXING
MODE SPLITTER
BRIDGED SUBWAVELENGTH GRATING

Info Detail Spesifik

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Pernyataan Tanggungjawab

Weifeng Jiang, Xinguo Wang

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