Optical waveguide grating interrogation system and sensor system

Glynn Lloyd (Inventor), Lorna Everall (Inventor)

Research output: Patent

Abstract

An optical waveguide grating interrogation system 10 comprises bi-directional optical amplifying and gating means, in the form of a semiconductor optical amplifier (SOA) 14 and an optical pulse source 12, 14. Drive means 22 (an electrical pulse generator triggered 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 pulse 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 gratings G to be interrogated. The interrogation system further comprises wavelength evaluation apparatus 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 numberEP1432149
IPCH04B 10/ 071 A I
Priority date16/12/02
Publication statusPublished - 23 Jun 2004

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interrogation
light amplifiers
optical waveguides
gratings
sensors
pulses
pulse generators
wavelengths
diodes
oscillators
waveguides
evaluation
causes
output

Cite this

Lloyd, G., & Everall, L. (2004). IPC No. H04B 10/ 071 A I. Optical waveguide grating interrogation system and sensor system. (Patent No. EP1432149).

Optical waveguide grating interrogation system and sensor system. / Lloyd, Glynn (Inventor); Everall, Lorna (Inventor).

IPC No.: H04B 10/ 071 A I. Patent No.: EP1432149.

Research output: Patent

Lloyd, G & Everall, L 2004, Optical waveguide grating interrogation system and sensor system, Patent No. EP1432149, IPC No. H04B 10/ 071 A I.
Lloyd G, Everall L, inventors. Optical waveguide grating interrogation system and sensor system. H04B 10/ 071 A I. 2004 Jun 23.
Lloyd, Glynn (Inventor) ; Everall, Lorna (Inventor). / Optical waveguide grating interrogation system and sensor system. IPC No.: H04B 10/ 071 A I. Patent No.: EP1432149.
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