High speed optoelectronics polyphase scheme for sampling and demultiplexing RF analog signals

Carlos Villa; Patrick Kumavor; Aaron Feldstein; Jennifer Hernandez; Eric Donkor

doi:10.1117/12.781449

24 March 2008 High speed optoelectronics polyphase scheme for sampling and demultiplexing RF analog signals

Carlos Villa, Patrick Kumavor, Aaron Feldstein, Jennifer Hernandez, Eric Donkor

Proceedings Volume 6975, Enabling Photonics Technologies for Defense, Security, and Aerospace Applications IV; 69750G (2008) https://doi.org/10.1117/12.781449
Event: SPIE Defense and Security Symposium, 2008, Orlando, Florida, United States

Abstract

A novel optoelectronic scheme for optical sampling and parallel demultiplexing of different phases (polyphase) of an input analog signal is presented. With this scheme higher sampling rate can be attained by scaling. A unique feature of this approach is that the electrical-in to electrical-out signal transfer is maintained for the optoelectronic sampling and demultiplexing process. We demonstrate the basic tenets of this approach by implementing an optoelectronics two-stages divide-by-four decimator circuit where the first stage demultiplexs a sampled signal having a repetition rate f into its even and odd subsamples with each subsample having a repetition rate of f/2 , and the second stage demultiplexs the even and odd subsamples into four subsamples, odd/odd, odd/even, even/odd and even/even, each subsample having a repetition rate of . f/4 As a practical testing, a 100MHz RF electrical signal was sampled at the rate of 1.28GSPS (Giga/Samples/Sec) and demultiplexed into four 320GSPS sampled signals.

Citation Download Citation

Carlos Villa, Patrick Kumavor, Aaron Feldstein, Jennifer Hernandez, and Eric Donkor "High speed optoelectronics polyphase scheme for sampling and demultiplexing RF analog signals", Proc. SPIE 6975, Enabling Photonics Technologies for Defense, Security, and Aerospace Applications IV, 69750G (24 March 2008); https://doi.org/10.1117/12.781449

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