On-board fabrication of multi-channel polymer optical waveguide with graded-index cores by soft-lithography

Takaaki Ishigure, Yosuke Nitta

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

4 Citations (Scopus)

Abstract

We succeeded in utilizing the soft-lithography method for fabricating a polymer waveguide with GI cores directly on a substrate. A UV-curable polymer (TPIR-202) supplied from Tokyo Ohka Kogyo Co. Ltd. is used to form the matrix of polymer waveguide. The GI cores are formed during the curing process of the core region, which is similar to the preform process we have reported. We experimentally confirm that near parabolic refractive index profiles were formed in the parallel cores (8 to 16 channels) with 80 um x 80 um size at 250-μm pitch. Although the loss is still as high as 0.2 - 0.3 dB/cm at 850 nm, which is mainly due to scattering loss inherent to the polymer matrix, the scattering loss attributed to the waveguide's structural irregularity could be sufficiently reduced by a graded refractive index profile. For comparison, we fabricate SI-core waveguides with the same materials by means of the same process. Then, we evaluate the inter-channel crosstalk in SI- and GI-core waveguides under almost the same conditions. It is noteworthy that remarkable crosstalk reduction (5 dB and beyond) is confirmed in the GI-core waveguides, since the propagating modes in GI-cores are tightly confined near the core center and less optical power is found near the core cladding boundary. This significant improvement in the interchannel crosstalk allows the GI-core waveguides to be utilized for extra high-density on-board optical interconnections.

Original languageEnglish
Title of host publication2010 Proceedings 60th Electronic Components and Technology Conference, ECTC 2010
Pages275-281
Number of pages7
DOIs
Publication statusPublished - 2010 Aug 9
Event60th Electronic Components and Technology Conference, ECTC 2010 - Las Vegas, NV, United States
Duration: 2010 Jun 12010 Jun 4

Publication series

NameProceedings - Electronic Components and Technology Conference
ISSN (Print)0569-5503

Other

Other60th Electronic Components and Technology Conference, ECTC 2010
CountryUnited States
CityLas Vegas, NV
Period10/6/110/6/4

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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    Ishigure, T., & Nitta, Y. (2010). On-board fabrication of multi-channel polymer optical waveguide with graded-index cores by soft-lithography. In 2010 Proceedings 60th Electronic Components and Technology Conference, ECTC 2010 (pp. 275-281). [5490962] (Proceedings - Electronic Components and Technology Conference). https://doi.org/10.1109/ECTC.2010.5490962