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Proceedings Paper

40 GSPS opto-electronic polyphase analog-to-digital converter
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Paper Abstract

A novel opto-electronic polyphase analog-to-digital converter scheme that entails parallel optical sampling of different phases of an input analog signal is presented. With this scheme higher sampling rate can be attained by scaling. We demonstrate the basic tenets of this approach by upscaling a 160MSPS optoelectronic analog-to-digital ADC system to design and implement a 40.96GSPS four-channel polyphase optoelectronic analog-to-digital system. An optoelectronic divide-by-two decimation technique is implemented for demultiplexing digital samples having a repetition rate f into its even and odd subsamples with each subsample having a repetition rate of f/2. A two stage concatenation of the basic divide-by-two decimation scheme is employed to demultiplex the 40.96GSPS sampled RF signals into 8 channels of demultiplexed data, each channel having a data-rate of 5.12GSPS. Detailed design parameters and experimental results are presented for both the 160MSPS and the 40GSPS, including the design and implementation of optical clock networks, polyphase RF sampling networks, and decimation or demultiplexing networks. In addition, the electronic quantization network for the 160MSPS ADC system is presented. The 160MSPS system was found to have effective bit-resolution of 6.97, third-harmonic distortion of 43.73dB, signal-to-noise-distortion of 43.73dB, and spurious free dynamic range of 41dB.

Paper Details

Date Published: 7 May 2007
PDF: 12 pages
Proc. SPIE 6572, Enabling Photonics Technologies for Defense, Security, and Aerospace Applications III, 657207 (7 May 2007); doi: 10.1117/12.721366
Show Author Affiliations
Carlos Villa, Univ. of Connecticut (United States)
Eric Donkor, Univ. of Connecticut (United States)
Michael Hayduk, Air Force Research Lab. (United States)
Rebecca Bussjager, Air Force Research Lab. (United States)

Published in SPIE Proceedings Vol. 6572:
Enabling Photonics Technologies for Defense, Security, and Aerospace Applications III
Michael J. Hayduk; Andrew R. Pirich; Peter J. Delfyett; Eric J. Donkor; John P. Barrios; Rebecca J. Bussjager; Michael L. Fanto; Robert L. Kaminski; Guifang Li; Hooman Mohseni; Edward W. Taylor, Editor(s)

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