Optical interrogation system and sensor system

Lorna Everall (Inventor), Glynn Lloyd (Inventor)

Research output: Patent


An optical interrogation system (10) comprises optical amplifying and gating means, in the form of a semiconductor optical amplifier (SOA) (14) and an optical source (12, 14). Drive means (22) (an electrical pulse generator driven by a variable frequency oscillator) are 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 superluminescent 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 comprises optical detection means (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 numberWO2004056017A1
IPCH04B 10/08
Priority date16/12/02
Filing date15/12/03
Publication statusPublished - 1 Jul 2004


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  • Optical Interrogation System and Sensor System

    Everall, L. & Lloyd, G., 12 Sept 2005, IPC No. H04B 10/071, G01D 5/353, Patent No. NO20052616, 31 May 2005, Priority date 15 Dec 2003, Priority No. WO2003GB05497

    Research output: Patent

  • Optical interrogation system and sensor system

    Everall, L. & Lloyd, G., 17 Jun 2004, IPC No. G01N 21/00, Patent No. US2004113056, 19 Sept 2003, Priority date 16 Dec 2002, Priority No. EP20020258640.8

    Research output: Patent

    Open Access
  • Optical Interrogation System And Sensor System

    Lorna, A. E. & Glynn, D. L., 9 Jul 2004, IPC No. H04B 10/071 A I, G01D5/353, Patent No. AU2003288565A1, 15 Dec 2003, Priority date 15 Dec 2003, Priority No. GB2003/005497

    Research output: Patent

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