Low-Loss and Small 2 x 4 lambda Multiplexers Based on 2 x 2 and 2 x 1 Mach-Zehnder Interferometers With On-Chip Polarization Multiplexing for 400GbE

Fujisawa, Takeshi; Takano, Junya; Sawada, Yusuke; Saitoh, Kunimasa

Low-Loss and Small 2 x 4 lambda Multiplexers Based on 2 x 2 and 2 x 1 Mach-Zehnder Interferometers With On-Chip Polarization Multiplexing for 400GbE

Fujisawa, Takeshi; Takano, Junya; Sawada, Yusuke et al.

Journal of lightwave technology, 2021, 39(1), 193-200

Permalink : https://hdl.handle.net/2115/83718

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アクセス権	open access
URI	https://hdl.handle.net/2115/83718
タイトル	Low-Loss and Small 2 x 4 lambda Multiplexers Based on 2 x 2 and 2 x 1 Mach-Zehnder Interferometers With On-Chip Polarization Multiplexing for 400GbE
著者	Fujisawa, Takeshi ; Takano, Junya ; Sawada, Yusuke ; Saitoh, Kunimasa
e-Rad_Researcher 70557660 著者名 Fujisawa, Takeshi
著者名 Takano, Junya
著者名 Sawada, Yusuke
e-Rad_Researcher 20333627 著者名 Saitoh, Kunimasa
言語	英語
キーワード	Bars
	Delay lines
	Silicon
	Optical waveguides
	Multiplexing
	Tuning
	Information filtering
	High-speed Ethernet
	O-band Si waveguide multiplexer
	LAN-WDM
発行日	2021-01-01
出版者	IEEE (Institute of Electrical and Electronics Engineers)
収録物名	Journal of lightwave technology
巻(号)	39(1)
ページ	193-200
抄録	Two silicon, 4 lambda O-band multiplexers (MUXs) for 400GbE using two Mach-Zehnder interferometers (MZIs) having 90-degree phase shift in their output with the help of on-chip polarization multiplexing are demonstrated. By using 2 x 2 and 2 x 1 MZIs for first 3200-GHz filters, the relative position of their spectra has 90-degree phase difference, leading to significant simplification of the tuning of peak wavelength position of the two filters. The polarization MUX is done by using an on-chip polarization-splitter-rotator (PSR) based on an asymmetric directional coupler (ADC) and a TE1-TM0 mode converter (MC) using tapered rib waveguide, designed for O-band application. Two 4 lambda MUXs for 1.28 and 1.3 mu m bands are designed, aiming to the specified wavelength range in 400GbE. Tolerance analysis shows the proposed MUX is robust to the change of waveguide width occurring in the fabrication process, compared with those of conventional multi-stage 4 lambda MUXs. The averaged insertion loss of eight wavelength is 1.86 dB for the fabricated device and the demonstration of 8 lambda (2x4 lambda) MUX for 400GbE based on Si-waveguide is for the first time.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
権利情報	© 2021 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
PISSN	0733-8724
NCID	AA10453426
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1109/JLT.2020.3025369