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Journal of Biomedical Optics • Open Access

Broadband optical ultrasound sensor with a unique open-cavity structure
Author(s): Colin Chow; Yun Zhou; Yunbo Guo; Theodore B. Norris; Xueding Wang; Cheri X. Deng; Jing Yong Ye

Paper Abstract

High-resolution ultrasound imaging requires quality sensors with wide bandwidth and high sensitivity, as shown in a wide range of applications, including intravascular imaging of cardiovascular diseases. However, piezoelectric technology, the current dominant approach for hydrophone fabrication, has encountered many technical limitations in the high-frequency range. Using optical techniques for the detection of high-frequency ultrasound signals has attracted much recent attention. One of the most studied approaches is based on a Fabry-Pérot interferometer, consisting of an optical cavity sandwiched between two mirrors. This technique offers promising sensitivity and bandwidth, and a potential alternative to piezoelectric polyvinylidene fluoride (PVDF) hydrophones. We propose an innovative optical ultrasound sensor using only a single mirror in a total-internal-reflection configuration. Besides retaining the advantages of Fabry-Pérot interferometer-based ultrasound sensors, this unique design provides a bandwidth of at least 160 MHz, a potential decrease in fabrication cost, and an increase in signal fidelity.

Paper Details

Date Published: 1 January 2011
PDF: 6 pages
J. Biomed. Opt. 16(1) 017001 doi: 10.1117/1.3528014
Published in: Journal of Biomedical Optics Volume 16, Issue 1
Show Author Affiliations
Colin Chow, Univ. of Michigan (United States)
Yun Zhou, Univ. of Michigan (United States)
Yunbo Guo, Univ. of Michigan (United States)
Theodore B. Norris, Univ. of Michigan (United States)
Xueding Wang, Univ. of Michigan (United States)
Cheri X. Deng, Univ. of Michigan (United States)
Jing Yong Ye, The Univ. of Texas at San Antonio (United States)

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