1 January 2011 Broadband optical ultrasound sensor with a unique open-cavity structure
Author Affiliations +
J. of Biomedical Optics, 16(1), 017001 (2011). doi:10.1117/1.3528014
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.
Colin Chow, Yun Zhou, Yunbo Guo, Theodore B. Norris, Xueding Wang, Cheri X. Deng, Jing Yong Ye, "Broadband optical ultrasound sensor with a unique open-cavity structure," Journal of Biomedical Optics 16(1), 017001 (1 January 2011). http://dx.doi.org/10.1117/1.3528014
Submission: Received ; Accepted
JOURNAL ARTICLE
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KEYWORDS
Sensors

Ultrasonography

Reflectivity

Ultrasonics

Dielectrics

Polymethylmethacrylate

Silica

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