High-frequency ultrasound array element using thermoelastic expansion in an elastomeric film
High-frequency ultrasound array element using thermoelastic expansion in an elastomeric film
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DOI：
10.1063/1.1388027
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发表时间：
2001-07-23
影响因子：
4
通讯作者：
O'Donnell, M
中科院分区：
文献类型：
--
作者：
Buma, T;Spisar, M;O'Donnell, M
利用热弹性效应在水中产生高频、宽带超声波。将脉冲二极管激光器和掺铒光纤放大器聚焦到玻璃基板上沉积的光吸收薄膜上。使用弹性薄膜代替更常用的金属薄膜，转换效率提高了 20 dB 以上。辐射方向图测量表明，对于超过 50 MHz 的频率，在 +/-45 度处会辐射大量能量。这些结果表明，热弹性效应可用于产生用于高频超声成像的相控阵。 (C) 2001 年美国物理研究所。
The thermoelastic effect was used to produce high-frequency, broadband ultrasound in water. A pulsed diode laser, followed by an erbium-doped fiber amplifier, was focused onto a light-absorbing film deposited on a glass substrate. Conversion efficiency was improved by over 20 dB using an elastomeric film instead of a more commonly used metallic one. Radiation pattern measurements show that considerable energy is radiated at +/-45 degrees for frequencies beyond 50 MHz. These results show that the thermoelastic effect can be used to produce phased arrays for high-frequency ultrasound imaging. (C) 2001 American Institute of Physics.