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Proceedings Paper

Polymer optical waveguides with reduced in-plane bend loss for electro-optical PCBs
Author(s): Richard Pitwon; Callum Smith; Kai Wang; Jasper Graham-Jones; David R. Selviah; Markus Halter; Alex Worrall
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Paper Abstract

In-plane bend loss represents the greatest commercial inhibitor to deploying multimode optical waveguides on densely populated electro-optical printed circuit boards (OPCB) as the minimum bend radii currently possible are too large to be practical in common designs. We present a concept and fabrication method for creating novel polymer optical waveguide structures with reduced bend losses to enable higher density routing on an OPCB. These nested core waveguide structures comprise a core surrounded by a thin shell of cladding, which allows for two-fold modal containment by first a conventional low refractive index contrast (LIC) boundary followed by a secondary high refractive index contrast (HIC) boundary. The purpose of this is to reduce the in-plane bend losses incurred on tightly routed optical channels, while not incurring prohibitive dispersion, sidewall scattering and optical crosstalk penalties. We have designed and fabricated nested core multimode polymer waveguides, evaluated their performance in comparison to conventional step-index waveguides and simulated these structures using the beam propagation method. Preliminary results are presented of our measurements and simulations.

Paper Details

Date Published: 1 February 2012
PDF: 10 pages
Proc. SPIE 8264, Integrated Optics: Devices, Materials, and Technologies XVI, 82640Z (1 February 2012); doi: 10.1117/12.919817
Show Author Affiliations
Richard Pitwon, Xyratex Technology Ltd. (United Kingdom)
Callum Smith, Univ. of Southampton (United Kingdom)
Kai Wang, Univ. College London (United Kingdom)
Jasper Graham-Jones, Plymouth Univ. (United Kingdom)
David R. Selviah, Univ. College London (United Kingdom)
Markus Halter, Vario-optics AG (Switzerland)
Alex Worrall, Xyratex Technology Ltd. (United Kingdom)

Published in SPIE Proceedings Vol. 8264:
Integrated Optics: Devices, Materials, and Technologies XVI
Jean Emmanuel Broquin; Gualtiero Nunzi Conti, Editor(s)

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