Tip-sensitive fibre-optic Bragg grating ultrasonic hydrophone for measuring high-intensity focused ultrasound fields

Author

Wang, D.H. ; Ping Gang Jia ; Ma, Z.G. ; Xie, L.F. ; Liang, Q.B.

Author_Institution

Key Lab. of Optoelectron. Technol. & Syst., Chongqing Univ., Chongqing, China

Volume

50

Issue

9

fYear

2014

fDate

April 24 2014

Firstpage

649

Lastpage

650

Abstract

A tip-sensitive fibre-optic Bragg grating ultrasonic hydrophone (TSFBGUH) with high spatial resolution for measuring high-intensity focused ultrasound (HIFU) fields is reported. When measuring a HIFU field, the sensitive axis of the TSFBGUH with a flexible fibre-optic sensor holder should be in parallel with the acoustic axis of the HIFU transducer to ensure the measured ultrasound impinges on the tip of the TSFBGUH. The TSFBGUH system has been established and tested. The experimental results show that the acoustic pressure sensitivity of the TSFBGUH system is about 31.3 mV/MPa within the measurement range of 10 MHz and the noise equivalent pressure is about 10.4 kPa.

Keywords

Bragg gratings; acoustic intensity; fibre optic sensors; hydrophones; ultrasonic measurement; Bragg grating ultrasonic hydrophone; HIFU fields; TSFBGUH instrument; acoustic pressure sensitivity; fibre optic ultrasonic hydrophone; high intensity focused ultrasound field measurement; spatial resolution; tip sensitive ultrasonic hydrophone;

fLanguage

English

Journal_Title

Electronics Letters

Publisher

iet

ISSN

0013-5194

Type

jour

DOI

10.1049/el.2013.3961

Filename

6809275