Characterization of a 40-MHz focused transducer with a fiber grating laser hydrophone
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- Title
- Characterization of a 40-MHz focused transducer with a fiber grating laser hydrophone
- Authors
- Lau, ST; Shao, LY; Chan, HLW; Tam, HY; Hu, CH; Kim, HH; Liu, RB; Zhou, QF; Shung, KK
- Date Issued
- 2008-12
- Publisher
- IEEE
- Abstract
- A novel fiber-optic hydrophone based on a dual-polarization, short-cavity fiber grating laser as the sensing element is described. Wet chemical etching was used to fabricate a thinned fiber sensor to extend its frequency response as well as spatial resolution. The lateral beam profile at the focal plane of a 40-MHz lens-focused lithium niobate (LiNbO3) transducer was measured with the fiber sensor, and a tomographic technique was used to compute the transducer profile, which is compared with that obtained by a PVDF hydrophone. The fiber hydrophone has a sensitivity of approximately -259 dB re 1V/mu Pa up to 40 MHz, which is higher than that of a commercial PVDF hydrophone. Moreover, it is capable of accurately characterizing the beam generated by high-frequency transducer.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/36652
- DOI
- 10.1109/TUFFC.2008.987
- ISSN
- 0885-3010
- Article Type
- Article
- Citation
- IEEE Trans. Ultrason. Ferroelect. Freq. Ctrl.,, vol. 55, no. 12, page. 2714 - 2718, 2008-12
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