Measurement of sound pressure and temperature in tissue-mimicking material using an optical fiber Bragg grating sensor
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The experimental investigation of an optical fiber Bragg grating (FBG) sensor for biomedical application is described. The FBG sensor can be used to measure sound pressure and temperature rise simultaneously in biological tissues exposed to ultrasound. The theoretical maximum values that can be measured with the FBG sensor are 73.0 MPa and 30 °C.
In this study, measurement of sound pressure up to 5 MPa was performed at an ultrasound frequency of 2 MHz. A maximum temperature change of 6 °C was measured in a tissue-mimicking material.
Values yielded by the FBG sensor agreed with those measured using a thermocouple and a hydrophone.
Since this sensor is used to monitor the sound pressure and temperature simultaneously, it can also be used for industrial applications, such as ultrasonic cleaning of semiconductors under controlled temperatures.
KeywordsFBG Viscous heating
This study is supported by the MEXT-Supported Program for the Strategic Research Foundation at Private Universities, 2013–2018.
Compliance with ethical standards
Conflict of interest
The authors declare that there is no conflict of interest.
This article does not contain any studies with human or animal subjects performed by any of the authors.
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