© The Institution of Electrical Engineers
An optical-fibre frequency shifter is described that is based upon the serrodyne technique and uses a simple piezoelectrically strained fibre as the phase shifting element. Acoustic damping and electronic feedback techniques for improving the response of the phase shifter are reported.
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http://iet.metastore.ingenta.com/content/journals/10.1049/ip-j.1985.0055
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