Ultra-compact silicon mode (de)multiplexers based on subwavelength structure

Xiaofei Wang; Nannan Ning; Hui Yu; Yuehai Wang; Jianyi Yang

doi:10.1117/12.2607204

24 November 2021 Ultra-compact silicon mode (de)multiplexers based on subwavelength structure

Xiaofei Wang, Nannan Ning, Hui Yu, Yuehai Wang, Jianyi Yang

Proceedings Volume 12062, AOPC 2021: Optoelectronics and Nanophotonics; 120620W (2021) https://doi.org/10.1117/12.2607204
Event: Applied Optics and Photonics China 2021, 2021, Beijing, China

Abstract

ultra-compact silicon mode (de)multiplexers are demonstrated based on asymmetric directional couplers with subwavelength structure (ADCWSS), the subwavelength structure is a series of corrugation on the sidewalls of waveguides, and the two arrays of corrugation extend into the gap region between the waveguides and interlace with each other. The coupling length of ADCWSS are 5.6μm, 6.5μm, and 7.9μm for TE0-TE1, TE0-TE2, TE0-TE3 mode (de)multiplexers, respectively. The four-mode mode-division-multiplexing (MDM) link was fabricated and measured. The insertion losses of TE0-TE0-TE0, TE0-TE1-TE0, TE0-TE2-TE0, and TE0-TE3-TE0 are 0.2dB, 0.7dB, 0.7dB and 0.9dB (around 1.55μm). The maximum insertion losses and crosstalk are 2.4dB, 2.9dB, 3.0dB, 4.0dB and -18dB, -19dB, -16dB, -18dB for the TE0, TE1, TE2 and TE3-mode channels over a 50-nm bandwidth.

Citation Download Citation

Xiaofei Wang, Nannan Ning, Hui Yu, Yuehai Wang, and Jianyi Yang "Ultra-compact silicon mode (de)multiplexers based on subwavelength structure", Proc. SPIE 12062, AOPC 2021: Optoelectronics and Nanophotonics, 120620W (24 November 2021); https://doi.org/10.1117/12.2607204

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