Heterodyne detection of ultrasound from rough surfaces using a double phase conjugate mirror
- 27 November 1995
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 67 (22) , 3251-3253
- https://doi.org/10.1063/1.114888
Abstract
We present an improved version of the classical heterodyneinterferometer for ultrasound detection, which includes a double phase conjugate mirror (DPCM) in the detection arm. The DPCM performs wave front adaptation to plane wave of the speckled beam scattered by the rough surface of the sample. The performances of the system are analyzed regarding the transmission (≊30%) and fidelity (≊70%) of the phase conjugation and the response time and étendue of the device. An example of application to the detection of laser generated ultrasound is also presented.Keywords
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