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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 13 — Jun. 21, 2010
  • pp: 13368–13378

High-density channel alignment of graded index core polymer optical waveguide and its crosstalk analysis with ray tracing method

Hsiang-Han Hsu and Takaaki Ishigure  »View Author Affiliations

Optics Express, Vol. 18, Issue 13, pp. 13368-13378 (2010)

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We fabricate graded index (GI) multi-channel polymer optical waveguides comprised of poly methyl methacrylate (PMMA)-poly benzyl methacrylate copolymer for the purpose of achieving high thermal stability in the GI profiles. The waveguides obtained show slightly higher propagation loss (0.033 dB/cm at 850 nm) than doped PMMA based GI-core polymer waveguides we have reported, due to the excess scattering loss inherent to the mixture of copolymer and homo-polymer in the core area. In this paper, we focus on the influence of the excess scattering loss on mode conversion and inter-channel crosstalk. We simulate the behavior of light propagating inside the core with and without the scattering effect. Using the simulation, the excess loss experimentally observed in the copolymer-core waveguide is successfully reproduced, and then, we find that the excess scattering loss of 0.008 dB/cm could increase the inter-channel crosstalk from −30 dB to −23 dB which agrees with the experimentally observed value. Although the simulation of the inter-channel crosstalk was performed only on our GI-core polymer optical waveguides, it is capable of modeling the conventional SI rectangular-core waveguides. Some amount of excess scattering is generally observed in the conventional SI-core waveguides, and thus, the application of this simulation to SI-core waveguides allows a feasible design for high-density alignment of the waveguides.

© 2010 OSA

OCIS Codes
(200.4650) Optics in computing : Optical interconnects
(250.5460) Optoelectronics : Polymer waveguides
(080.5692) Geometric optics : Ray trajectories in inhomogeneous media

ToC Category:
Integrated Optics

Original Manuscript: April 23, 2010
Revised Manuscript: June 2, 2010
Manuscript Accepted: June 2, 2010
Published: June 7, 2010

Hsiang-Han Hsu and Takaaki Ishigure, "High-density channel alignment of graded index core polymer optical waveguide and its crosstalk analysis with ray tracing method," Opt. Express 18, 13368-13378 (2010)

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