High-efficiency optical coupling between VCSEL and 90-degree-bent Graded-Index Core Polymer Waveguide with Numeral Aperture Optimization

Naohiro Kohmu; Maho Ishii; Takaaki Ishigure

doi:10.1109/ICSJ52620.2021.9648865

High-efficiency optical coupling between VCSEL and 90-degree-bent Graded-Index Core Polymer Waveguide with Numeral Aperture Optimization

Naohiro Kohmu, Maho Ishii, Takaaki Ishigure

Department of Applied Physics and Physico-Informatics

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

1 Citation (Scopus)

Abstract

In this paper, we propose a higher efficiency optical coupling technique using 90-degree-bent Graded-Index (GI) core polymer waveguide which replaces conventional optical assembly (mirrors and lenses) in vertical cavity surface emitting laser (VCSEL) based optical engines. The 90-degree-bent GI-core polymer waveguides are fabricated using the Mosquito method. However, high coupling loss could be caused by the VCSEL beam divergence due to diffraction in the lens free coupling. We theoretically confirm that total insertion loss including bending loss as well as coupling loss could remain low by the waveguide NA control. Fabricating the 90-degree-bent GI-core polymer waveguides with the optimized NA, a waveguide insertion loss as low as about 2 dB is experimentally achieved.

Original language	English
Title of host publication	2021 IEEE CPMT Symposium Japan, ICSJ 2021
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	150-153
Number of pages	4
ISBN (Electronic)	9781665440790
DOIs	https://doi.org/10.1109/ICSJ52620.2021.9648865
Publication status	Published - 2021
Event	10th IEEE CPMT Symposium Japan, ICSJ 2021 - Kyoto, Japan Duration: 2021 Nov 10 → 2021 Nov 12

Publication series

Name	2021 IEEE CPMT Symposium Japan, ICSJ 2021

Conference

Conference	10th IEEE CPMT Symposium Japan, ICSJ 2021
Country/Territory	Japan
City	Kyoto
Period	21/11/10 → 21/11/12

Keywords

90°-bend polymer waveguide
GI-core polymer waveguide
On-board optical interconnect
VCSEL based optical engine

ASJC Scopus subject areas

Instrumentation
Atomic and Molecular Physics, and Optics
Computer Networks and Communications
Control and Systems Engineering
Electrical and Electronic Engineering
Electronic, Optical and Magnetic Materials

Access to Document

10.1109/ICSJ52620.2021.9648865

Cite this

Kohmu, N., Ishii, M., & Ishigure, T. (2021). High-efficiency optical coupling between VCSEL and 90-degree-bent Graded-Index Core Polymer Waveguide with Numeral Aperture Optimization. In 2021 IEEE CPMT Symposium Japan, ICSJ 2021 (pp. 150-153). (2021 IEEE CPMT Symposium Japan, ICSJ 2021). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ICSJ52620.2021.9648865

High-efficiency optical coupling between VCSEL and 90-degree-bent Graded-Index Core Polymer Waveguide with Numeral Aperture Optimization. / Kohmu, Naohiro; Ishii, Maho; Ishigure, Takaaki.

2021 IEEE CPMT Symposium Japan, ICSJ 2021. Institute of Electrical and Electronics Engineers Inc., 2021. p. 150-153 (2021 IEEE CPMT Symposium Japan, ICSJ 2021).

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

Kohmu, N, Ishii, M & Ishigure, T 2021, High-efficiency optical coupling between VCSEL and 90-degree-bent Graded-Index Core Polymer Waveguide with Numeral Aperture Optimization. in 2021 IEEE CPMT Symposium Japan, ICSJ 2021. 2021 IEEE CPMT Symposium Japan, ICSJ 2021, Institute of Electrical and Electronics Engineers Inc., pp. 150-153, 10th IEEE CPMT Symposium Japan, ICSJ 2021, Kyoto, Japan, 21/11/10. https://doi.org/10.1109/ICSJ52620.2021.9648865

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abstract = "In this paper, we propose a higher efficiency optical coupling technique using 90-degree-bent Graded-Index (GI) core polymer waveguide which replaces conventional optical assembly (mirrors and lenses) in vertical cavity surface emitting laser (VCSEL) based optical engines. The 90-degree-bent GI-core polymer waveguides are fabricated using the Mosquito method. However, high coupling loss could be caused by the VCSEL beam divergence due to diffraction in the lens free coupling. We theoretically confirm that total insertion loss including bending loss as well as coupling loss could remain low by the waveguide NA control. Fabricating the 90-degree-bent GI-core polymer waveguides with the optimized NA, a waveguide insertion loss as low as about 2 dB is experimentally achieved.",

keywords = "90°-bend polymer waveguide, GI-core polymer waveguide, On-board optical interconnect, VCSEL based optical engine",

author = "Naohiro Kohmu and Maho Ishii and Takaaki Ishigure",

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N2 - In this paper, we propose a higher efficiency optical coupling technique using 90-degree-bent Graded-Index (GI) core polymer waveguide which replaces conventional optical assembly (mirrors and lenses) in vertical cavity surface emitting laser (VCSEL) based optical engines. The 90-degree-bent GI-core polymer waveguides are fabricated using the Mosquito method. However, high coupling loss could be caused by the VCSEL beam divergence due to diffraction in the lens free coupling. We theoretically confirm that total insertion loss including bending loss as well as coupling loss could remain low by the waveguide NA control. Fabricating the 90-degree-bent GI-core polymer waveguides with the optimized NA, a waveguide insertion loss as low as about 2 dB is experimentally achieved.

AB - In this paper, we propose a higher efficiency optical coupling technique using 90-degree-bent Graded-Index (GI) core polymer waveguide which replaces conventional optical assembly (mirrors and lenses) in vertical cavity surface emitting laser (VCSEL) based optical engines. The 90-degree-bent GI-core polymer waveguides are fabricated using the Mosquito method. However, high coupling loss could be caused by the VCSEL beam divergence due to diffraction in the lens free coupling. We theoretically confirm that total insertion loss including bending loss as well as coupling loss could remain low by the waveguide NA control. Fabricating the 90-degree-bent GI-core polymer waveguides with the optimized NA, a waveguide insertion loss as low as about 2 dB is experimentally achieved.

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High-efficiency optical coupling between VCSEL and 90-degree-bent Graded-Index Core Polymer Waveguide with Numeral Aperture Optimization

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