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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (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 languageEnglish
Title of host publication2021 IEEE CPMT Symposium Japan, ICSJ 2021
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages150-153
Number of pages4
ISBN (Electronic)9781665440790
DOIs
Publication statusPublished - 2021
Event10th IEEE CPMT Symposium Japan, ICSJ 2021 - Kyoto, Japan
Duration: 2021 Nov 102021 Nov 12

Publication series

Name2021 IEEE CPMT Symposium Japan, ICSJ 2021

Conference

Conference10th IEEE CPMT Symposium Japan, ICSJ 2021
Country/TerritoryJapan
CityKyoto
Period21/11/1021/11/12

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

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