Open AccessTip‐sensitive fibre‐optic Bragg grating ultrasonic hydrophone for measuring high‐intensity focused ultrasound fields
Author(s) -
Wang D.H.,
Jia Ping Gang,
Ma Z.G.,
Xie L.F.,
Liang Q.B.
Publication year - 2014
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2013.3961
Subject(s) - hydrophone , materials science , ultrasonic sensor , transducer , ultrasound , acoustics , optics , sound pressure , fiber bragg grating , sound intensity , pressure sensor , grating , optical fiber , sensitivity (control systems) , optoelectronics , electronic engineering , physics , engineering , thermodynamics , sound (geography)
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.