| Autor: |
Chow CM; University of Michigan, Department of Electrical Engineering and Computer Science, Ann Arbor, Michigan 48109, USA., Zhou Y, Guo Y, Norris TB, Wang X, Deng CX, Ye JY |
| Jazyk: |
angličtina |
| Zdroj: |
Journal of biomedical optics [J Biomed Opt] 2011 Jan-Feb; Vol. 16 (1), pp. 017001. |
| DOI: |
10.1117/1.3528014 |
| Abstrakt: |
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. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
|
