High-Bandwidth and Large Coupling Tolerance Graded-Index Multimode Polymer Waveguides for On-Board High-Speed Optical Interconnects
- 13 November 2015
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in Journal of Lightwave Technology
- Vol. 34 (12), 2934-2940
- https://doi.org/10.1109/jlt.2015.2500611
Abstract
Optical interconnects have attracted significant research interest for use in short-reach board-level optical communication links in supercomputers and data centers. Multimode polymer waveguides in particular constitute an attractive technology for on-board optical interconnects, as they provide high bandwidth, offer relaxed alignment tolerances, and can be cost-effectively integrated onto standard printed circuit boards (PCBs). However, the continuing improvements in bandwidth performance of optical sources make it important to investigate approaches to develop high-bandwidth polymer waveguides. In this paper, we present dispersion studies on a graded-index (GI) waveguide in siloxane materials designed to deliver high bandwidth over a range of launch conditions. Bandwidth-length products of >70 and ~65 GHz×m are observed using a 50/125 μm multimode fibre (MMF) launch for input offsets of ±10 μm without and with the use of a mode mixer (MM), respectively; and enhanced values of >100 GHz×m are found under a 10× microscope objective launch for input offsets of ~18 × 20 μm 2 . The large range of offsets is within the -1 dB alignment tolerances. A theoretical model is developed using the measured refractive index profile of the waveguide, and general agreement is found with experimental bandwidth measurements. The reported results clearly demonstrate the potential of this technology for use in high-speed board-level optical links, and indicate that data transmission of 100 Gb/s over a multimode polymer waveguide is feasible with appropriate refractive index engineering.Keywords
This publication has 32 references indexed in Scilit:
- 40 Gb/s Data Transmission Over a 1-m-Long Multimode Polymer Spiral Waveguide for Board-Level Optical InterconnectsJournal of Lightwave Technology, 2014
- Graded index silicone waveguides for high performance computingPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2014
- Development of Versatile Polymer Waveguide Flex Technology for Use in Optical InterconnectsJournal of Lightwave Technology, 2013
- Flexible, stable, and easily processable optical silicones for low loss polymer waveguidesPublished by SPIE-Intl Soc Optical Eng ,2013
- High Bandwidth Optical Interconnection for Densely Integrated ServerPublished by Optica Publishing Group ,2013
- Polymer parallel optical waveguide with graded-index rectangular cores and its dispersion analysis.Optics Express, 2009
- Hard-molded 51 cm long waveguide array with a 150 GHz bandwidth for board-level optical interconnects.Optics Letters, 2007
- Modeling and simulation of next-generation multimode fiber linksJournal of Lightwave Technology, 2003
- An experimental and theoretical study of the offset launch technique for the enhancement of the bandwidth of multimode fiber linksJournal of Lightwave Technology, 1998
- Practical application of the refracted near-field technique for the measurement of optical fibre refractive index profilesOptical and Quantum Electronics, 1979