Journal
OPTICS AND LASER TECHNOLOGY
Volume 41, Issue 6, Pages 764-769Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.optlastec.2008.12.013
Keywords
Spatial domain multiplexing (SDM); CMOS photodiodes; Optical communications
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Funding
- MOSIS Education Program (MEP)
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A novel octagonal structure of photodiodes using standard CMOS technology has been developed to serve as a de-multiplexer for spatially multiplexed fiber optic communication systems. Concentric photodiodes of six different structure types are investigated for this purpose. The responsivity of the fabricated devices lies within ten percent of the theoretical values at 660 nm. The concept is demonstrated for silicon and the geometry can be extended to other materials commonly used in optical communications. This presents structural details, device model and equivalent circuits for these devices. Test results for detector responsivity, leakage currents and quantum efficiency are also presented. (C) 2008 Elsevier Ltd. All rights reserved.
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