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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
Title: | 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 |
Authors: | Fujisawa, Takeshi Browse this author →KAKEN DB | Takano, Junya Browse this author | Sawada, Yusuke Browse this author | Saitoh, Kunimasa Browse this author →KAKEN DB |
Keywords: | Bars | Delay lines | Silicon | Optical waveguides | Multiplexing | Tuning | Information filtering | High-speed Ethernet | O-band Si waveguide multiplexer | LAN-WDM |
Issue Date: | 1-Jan-2021 |
Publisher: | IEEE (Institute of Electrical and Electronics Engineers) |
Journal Title: | Journal of lightwave technology |
Volume: | 39 |
Issue: | 1 |
Start Page: | 193 |
End Page: | 200 |
Publisher DOI: | 10.1109/JLT.2020.3025369 |
Abstract: | 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. |
Rights: | © 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. |
Type: | article (author version) |
URI: | http://hdl.handle.net/2115/83718 |
Appears in Collections: | 情報科学院・情報科学研究院 (Graduate School of Information Science and Technology / Faculty of Information Science and Technology) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 藤澤 剛
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