Ultrasound detection by using a confocal Fabry-Perot interferometer with phase-modulated light

被引：6
|
作者：
Nakano, H [1 ]
Matsuda, Y [1 ]
Nagai, S [1 ]
机构：
[1] Natl Res Lab Metrol, Tsukuba, Ibaraki 3058563, Japan
来源：
ULTRASONICS | 1999年 / 37卷 / 03期
关键词：
dark fringe; Fabry-Perot interferometer; laser ultrasonics; phase modulator;
D O I：
10.1016/S0041-624X(98)00066-3
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
摘要：
The optical detection of ultrasound with a radio-frequency (RF) sideband type of optical discriminator is described. The sidebands are produced on a laser beam by an optical phase modulator. A confocal Fabry-Perot interferometer with a lens at the mid-point in the cavity has been used to provide frequency discriminator functions. The cavity is tuned to the maximum transmission point, and then the RF beat signal in the back-reflection beam is detected. The ultrasound signals are obtained from the phase changes between the detected RF signal and the modulation source. Several experimental results are presented. (C) 1999 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：257 / 259
页数：3
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