We demonstrate experimentally a new laser microphone using a highly sensitive pulsed laser vibrometer. By using the photo-electromotive-force (photo-EMF) sensors, we present data indicating the real-time detection of surface displacements as small as 4 pm.
© 2008 Optical Society of America
(110.0110) Imaging systems : Imaging systems
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(120.7280) Instrumentation, measurement, and metrology : Vibration analysis
(110.5125) Imaging systems : Photoacoustics
C. Wang, S. Trivedi, F. Jin, V. Swaminathan, and N. S. Prasad, "A New Kind of Laser Microphone Using High Sensitivity Pulsed Laser Vibrometer," in Conference on Lasers and Electro-Optics/Quantum Electronics and Laser Science Conference and Photonic Applications Systems Technologies, OSA Technical Digest (CD) (Optical Society of America, 2008), paper JThA62.
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