Title :
A novel miniature optical fibre probe for MHz frequency ultrasound
Author :
Surowiec, J. ; Fisher, N.E. ; Webb, D.J. ; Jackson, D.A. ; Gavrilov, L. ; Hand, J.W. ; Zhang, L. ; Bennion, I.
Author_Institution :
Phys. Lab., Canterbury Univ., Christchurch, New Zealand
Abstract :
The authors investigate the feasibilty of using in-fibre Bragg gratings to measure ultrasonic fields for medical applications. Two signal processing schemes for interrogating the gratings are described. Preliminary results for each scheme (one a homodyne approach, the other a heterodyne) give a noise limited pressure resolution of 2.2×10 -4 Atm/Hz½ and 1.8×10-2 Atm/Hz½, respectively. The second scheme however, gives a more stable response
Keywords :
biomedical ultrasonics; diffraction gratings; fibre optic sensors; medical signal processing; probes; signal detection; MHz frequency ultrasound; gratings interrogation; heterodyne approach; homodyne approach; in-fibre Bragg gratings; medical applications; miniature optical fibre probe; noise limited pressure resolution; signal processing schemes; stable response; ultrasonic fields measurement; Biomedical equipment; Bragg gratings; Frequency; Medical services; Optical fibers; Optical noise; Optical signal processing; Probes; Ultrasonic imaging; Ultrasonic variables measurement;
Conference_Titel :
Ultrasonics Symposium, 1996. Proceedings., 1996 IEEE
Conference_Location :
San Antonio, TX
Print_ISBN :
0-7803-3615-1
DOI :
10.1109/ULTSYM.1996.584172
