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Advances in Optical Technologies
Volume 2013 (2013), Article ID 738427, 8 pages
Research Article

Photonic Processing for Wideband Cancellation and Spectral Discrimination of RF Signals

L-3 TRL Technology, Unit 19 Miller Court, Severn Drive, Tewkesbury, Gloucestershire GL20 8DN, UK

Received 9 July 2013; Revised 16 October 2013; Accepted 16 October 2013

Academic Editor: Augusto Beléndez

Copyright © 2013 David M. Benton. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Photonic signal processing is used to implement common mode signal cancellation across a very wide bandwidth utilising phase modulation of radio frequency (RF) signals onto a narrow linewidth laser carrier. RF spectra were observed using narrow-band, tunable optical filtering using a scanning Fabry Perot etalon. Thus functions conventionally performed using digital signal processing techniques in the electronic domain have been replaced by analog techniques in the photonic domain. This technique was able to observe simultaneous cancellation of signals across a bandwidth of 1400 MHz, limited only by the free spectral range of the etalon.