Resonant cavity time-division-multiplexed fiber Bragg grating sensor interrogator

Glynn D. Lloyd*, Lorna A. Everall, Kate Sugden, Ian Bennion

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


The first resonant-cavity time-division-multiplexed (TDM) fiber Bragg grating sensor interrogation system is reported. This novel design uses a pulsed semiconductor optical amplifier in a cyclic manner to function as the optical source, amplifier, and modulator. Compatible with a range of standard wavelength detection techniques, this optically gated TDM system allows interrogation of low reflectivity "commodity" sensors spaced just 2 m apart, using a single active component. Results demonstrate an exceptional optical signal-to-noise ratio of 36 dB, a peak signal power of over +7 dBm, and no measurable crosstalk between sensors. Temperature tuning shows that the system is fully stable with a highly linear response. © 2004 IEEE.

Original languageEnglish
Pages (from-to)2323-2325
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number10
Early online date27 Sept 2004
Publication statusPublished - Oct 2004


  • fiber bragg gratings (fbgs)
  • optical fiber sensing
  • resonant cavity
  • semiconductor optical amplifier (soa)
  • time-division multiplexing (tdm)


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