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Silicon Optical Modulator Using a Low-Loss Phase Shifter Based on a Multimode Interference Waveguide
We have developed a novel phase modulator, based on fin-type electrodes placed at self-imaging positions of a silicon multimode interference (MMI) waveguide, which allows reduced scattering losses and relaxes the fabrication tolerance. The measured propagation losses and spectral bandwidth are 0.7 d...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6680442/ https://www.ncbi.nlm.nih.gov/pubmed/31323731 http://dx.doi.org/10.3390/mi10070482 |
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author | Inoue, Daisuke Ichikawa, Tadashi Kawasaki, Akari Yamashita, Tatsuya |
author_facet | Inoue, Daisuke Ichikawa, Tadashi Kawasaki, Akari Yamashita, Tatsuya |
author_sort | Inoue, Daisuke |
collection | PubMed |
description | We have developed a novel phase modulator, based on fin-type electrodes placed at self-imaging positions of a silicon multimode interference (MMI) waveguide, which allows reduced scattering losses and relaxes the fabrication tolerance. The measured propagation losses and spectral bandwidth are 0.7 dB and 33 nm, respectively, on a 987 μm-long phase shifter. Owing to the self-imaging effect in the MMI waveguide, the wave-front expansion to the electrode was counteracted, and therefore, the scattering loss caused by electrode fins was successfully mitigated. As a proof-of-concept for the MMI-based phase modulator applications, we performed optical modulation based on Mach–Zehnder interferometers (MZIs). The π shift current of the modulator was 1.5 mA. |
format | Online Article Text |
id | pubmed-6680442 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-66804422019-08-09 Silicon Optical Modulator Using a Low-Loss Phase Shifter Based on a Multimode Interference Waveguide Inoue, Daisuke Ichikawa, Tadashi Kawasaki, Akari Yamashita, Tatsuya Micromachines (Basel) Letter We have developed a novel phase modulator, based on fin-type electrodes placed at self-imaging positions of a silicon multimode interference (MMI) waveguide, which allows reduced scattering losses and relaxes the fabrication tolerance. The measured propagation losses and spectral bandwidth are 0.7 dB and 33 nm, respectively, on a 987 μm-long phase shifter. Owing to the self-imaging effect in the MMI waveguide, the wave-front expansion to the electrode was counteracted, and therefore, the scattering loss caused by electrode fins was successfully mitigated. As a proof-of-concept for the MMI-based phase modulator applications, we performed optical modulation based on Mach–Zehnder interferometers (MZIs). The π shift current of the modulator was 1.5 mA. MDPI 2019-07-18 /pmc/articles/PMC6680442/ /pubmed/31323731 http://dx.doi.org/10.3390/mi10070482 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Letter Inoue, Daisuke Ichikawa, Tadashi Kawasaki, Akari Yamashita, Tatsuya Silicon Optical Modulator Using a Low-Loss Phase Shifter Based on a Multimode Interference Waveguide |
title | Silicon Optical Modulator Using a Low-Loss Phase Shifter Based on a Multimode Interference Waveguide |
title_full | Silicon Optical Modulator Using a Low-Loss Phase Shifter Based on a Multimode Interference Waveguide |
title_fullStr | Silicon Optical Modulator Using a Low-Loss Phase Shifter Based on a Multimode Interference Waveguide |
title_full_unstemmed | Silicon Optical Modulator Using a Low-Loss Phase Shifter Based on a Multimode Interference Waveguide |
title_short | Silicon Optical Modulator Using a Low-Loss Phase Shifter Based on a Multimode Interference Waveguide |
title_sort | silicon optical modulator using a low-loss phase shifter based on a multimode interference waveguide |
topic | Letter |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6680442/ https://www.ncbi.nlm.nih.gov/pubmed/31323731 http://dx.doi.org/10.3390/mi10070482 |
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