Graded-Index Multimode Polymer Optical Waveguide Enabling Low Loss and High Density 3D On-Board Integration

Akira Yamauchi; Yoshie Morimoto; Tadayuki Enomoto; Kyuta Suzuki; Hikaru Masuda; Takaaki Ishigure

doi:10.1109/ECTC.2016.306

Graded-Index Multimode Polymer Optical Waveguide Enabling Low Loss and High Density 3D On-Board Integration

Akira Yamauchi, Yoshie Morimoto, Tadayuki Enomoto, Kyuta Suzuki, Hikaru Masuda, Takaaki Ishigure

Department of Applied Physics and Physico-Informatics

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

10 Citations (Scopus)

Abstract

We present polymer optical waveguides with graded index (GI) circular core that have unique structures on their ends to enable very low-loss 90-degree vertical optical path conversion. In general, the signal light from the VCSELs mounted on optical printed circuit boards (OPCBs) needs to be perpendicularly bent in order to couple to the waveguides integrated on board and similarly from the waveguide to the photodetectors. Therefore, optical path conversion structures between horizontal and vertical directions are required on the ends of waveguides. In the case of multimode polymer optical waveguides with step-index (SI) core, 45-degree mirrors at the waveguide ends should be a well-known technique when they are integrated on boards. However, a couple of dB of optical loss at lowest has generally been observed at the mirrors, which is very critical for the limited link power budget of polymer waveguide links. In this paper, we demonstrate that GI-cores in polymer waveguides enable 3-dB loss advantage over the SI-core waveguides in the optical path conversion.

Original language	English
Title of host publication	Proceedings - ECTC 2016: 66th Electronic Components and Technology Conference
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	490-496
Number of pages	7
Volume	2016-August
ISBN (Electronic)	9781509012039
DOIs	https://doi.org/10.1109/ECTC.2016.306
Publication status	Published - 2016 Aug 16
Event	66th IEEE Electronic Components and Technology Conference, ECTC 2016 - Las Vegas, United States Duration: 2016 May 31 → 2016 Jun 3

Other

Other	66th IEEE Electronic Components and Technology Conference, ECTC 2016
Country/Territory	United States
City	Las Vegas
Period	16/5/31 → 16/6/3

Keywords

Graded-index
Optical interconnect
Polymer optical waveguides
The Mosquito method

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

Access to Document

10.1109/ECTC.2016.306

Cite this

Yamauchi, A., Morimoto, Y., Enomoto, T., Suzuki, K., Masuda, H., & Ishigure, T. (2016). Graded-Index Multimode Polymer Optical Waveguide Enabling Low Loss and High Density 3D On-Board Integration. In Proceedings - ECTC 2016: 66th Electronic Components and Technology Conference (Vol. 2016-August, pp. 490-496). Article 7545476 Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ECTC.2016.306

Graded-Index Multimode Polymer Optical Waveguide Enabling Low Loss and High Density 3D On-Board Integration. / Yamauchi, Akira; Morimoto, Yoshie; Enomoto, Tadayuki et al.
Proceedings - ECTC 2016: 66th Electronic Components and Technology Conference. Vol. 2016-August Institute of Electrical and Electronics Engineers Inc., 2016. p. 490-496 7545476.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Yamauchi, A, Morimoto, Y, Enomoto, T, Suzuki, K, Masuda, H & Ishigure, T 2016, Graded-Index Multimode Polymer Optical Waveguide Enabling Low Loss and High Density 3D On-Board Integration. in Proceedings - ECTC 2016: 66th Electronic Components and Technology Conference. vol. 2016-August, 7545476, Institute of Electrical and Electronics Engineers Inc., pp. 490-496, 66th IEEE Electronic Components and Technology Conference, ECTC 2016, Las Vegas, United States, 16/5/31. https://doi.org/10.1109/ECTC.2016.306

Yamauchi A, Morimoto Y, Enomoto T, Suzuki K, Masuda H, Ishigure T. Graded-Index Multimode Polymer Optical Waveguide Enabling Low Loss and High Density 3D On-Board Integration. In Proceedings - ECTC 2016: 66th Electronic Components and Technology Conference. Vol. 2016-August. Institute of Electrical and Electronics Engineers Inc. 2016. p. 490-496. 7545476 doi: 10.1109/ECTC.2016.306

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AB - We present polymer optical waveguides with graded index (GI) circular core that have unique structures on their ends to enable very low-loss 90-degree vertical optical path conversion. In general, the signal light from the VCSELs mounted on optical printed circuit boards (OPCBs) needs to be perpendicularly bent in order to couple to the waveguides integrated on board and similarly from the waveguide to the photodetectors. Therefore, optical path conversion structures between horizontal and vertical directions are required on the ends of waveguides. In the case of multimode polymer optical waveguides with step-index (SI) core, 45-degree mirrors at the waveguide ends should be a well-known technique when they are integrated on boards. However, a couple of dB of optical loss at lowest has generally been observed at the mirrors, which is very critical for the limited link power budget of polymer waveguide links. In this paper, we demonstrate that GI-cores in polymer waveguides enable 3-dB loss advantage over the SI-core waveguides in the optical path conversion.

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Graded-Index Multimode Polymer Optical Waveguide Enabling Low Loss and High Density 3D On-Board Integration

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