A novel wavelength division multiplexed system architecture for high resolution sampling and digitisation of broadband microwave signals

John M. Heaton, Pisu Jiang, Damian Gotch, Richard Fawley, Yi Zhou, Stephen Clements, Ian White, Richard Lang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Military applications such as electronic surveillance (ESM), intelligence (ELINT) and countermeasures (ECM) require real-time analysis of broadband RF signals, often with very high frequency resolution. Direct sampling and digitisation, followed by Fourier analysis and signal processing, will enable such signals to be analysed with much higher resolution than can be achieved with conventional microwave techniques. Direct sampling and digitisation of signals at frequencies above a few GHz is difficult to achieve electronically because the rise and fall times of electrical sampling gates are too long. This can be overcome by using a low-jitter optical sampling pulse train to measure the voltage on an electro-optic modulator. Optical sampling pulses can be very much shorter than electrical sampling pulses because of the large optical carrier frequency. In this paper we describe a novel multiple wavelength optical sampling system architecture for the real-time digitising of microwave signals between 1 and 20 GHz with a target resolution of more than 10 effective bits (>60 dB spurious free dynamic range). We also describe our work on making highly linear electro-optic modulators for this and other microwave-photonic applications.

Original languageEnglish
Title of host publicationElectro-Optical Remote Sensing, Detection, and Photonic Technologies and Their Applications
DOIs
Publication statusPublished - 1 Dec 2007
EventElectro-Optical Remote Sensing, Detection, and Photonic Technologies and Their Applications - Florence, Italy
Duration: 18 Sep 200720 Sep 2007

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume6739
ISSN (Print)0277-786X

Conference

ConferenceElectro-Optical Remote Sensing, Detection, and Photonic Technologies and Their Applications
CountryItaly
CityFlorence
Period18/09/0720/09/07

Keywords

  • Analogue-to-digital
  • Electro-optic modulator
  • Optical sampling
  • RF-photonic

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Heaton, J. M., Jiang, P., Gotch, D., Fawley, R., Zhou, Y., Clements, S., White, I., & Lang, R. (2007). A novel wavelength division multiplexed system architecture for high resolution sampling and digitisation of broadband microwave signals. In Electro-Optical Remote Sensing, Detection, and Photonic Technologies and Their Applications [67390M] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 6739). https://doi.org/10.1117/12.740706