Title :
Miniature optical fibre ultrasonic hydrophone using a Fabry-Perot polymer film interferometer
Author :
Beard, P.C. ; Mills, T.N.
Author_Institution :
Dept. of Med. Phys. & Bioeng., Univ. Coll. London, UK
fDate :
4/24/1997 12:00:00 AM
Abstract :
An optical fibre hydrophone for the measurement and detection of ultrasound is described. The active sensing element consists of a low finesse Fabry-Perot polymer film interferometer bonded to the tip of an optical fibre, of 50 μm core diameter and 0.25 mm outer diameter. Sensitivity was found to be 114 mV/MPa with an acoustic noise floor of 15 kPa over a 25 MHz bandwidth
Keywords :
Fabry-Perot interferometers; fibre optic sensors; hydrophones; polymer films; ultrasonic measurement; 0.25 mm; 25 MHz; 50 micron; Fabry-Perot polymer film interferometer; acoustic noise floor; active sensing element; core diameter; optical fibre; optical fibre ultrasonic hydrophone; outer diameter; ultrasound detection;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19970545
