Optical interrogation system and sensor system

Lorna Everall (Inventor), Glynn Lloyd (Inventor)

Research output: Patent


An optical interrogation system 10 includes optical amplifying and gating apparatus, in the form of a semiconductor optical amplifier (SOA) 14 and an optical source 12, 14. Drive apparatus 22 (an electrical pulse generator driven by a variable frequency oscillator) is provided to generate electrical drive pulses (see inset (a)) which are applied to the SOA 14, to cause the SOA 14 to switch on and off. The optical source comprises a super-luminescent diode (SLD) 12, the CW output from which is gated into optical pulses by the SOA 14. The SOA 14 is optically coupled to the waveguide 16 containing an array of reflective optical elements (gratings G) to be interrogated. The interrogation system further includes an optical detector 18, optically coupled to the SOA 14, operable to evaluate the wavelength of a returned optical pulse transmitted by the SOA 14.

Original languageEnglish
Patent numberUS2004113056
IPCH04B 10/ 071 A I
Priority date16/12/02
Publication statusPublished - 17 Jun 2004

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  • Research Output

    Optical waveguide grating interrogation system and sensor system

    Lloyd, G. & Everall, L., 23 Jun 2004, IPC No. H04B 10/ 071 A I, Patent No. EP1432149, Priority date 16 Dec 2002, Priority No. EP20020258640

    Research output: Patent

    Open Access
  • Cite this

    Everall, L., & Lloyd, G. (2004). IPC No. H04B 10/ 071 A I. Optical interrogation system and sensor system. (Patent No. US2004113056).