Title :
A new kind of laser microphone using high sensitivity pulsed laser vibrometer
Author :
Wang, Chen-Chia ; Trivedi, Sudhir ; Jin, Feng ; Swaminathan, V. ; Prasad, Narasimha S.
Author_Institution :
Brimrose Corp. of America, Baltimore, MD
Abstract :
We demonstrate experimentally a new kind of 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.
Keywords :
displacement measurement; electric potential; measurement by laser beam; microphones; optical sensors; photoacoustic effect; vibration measurement; laser microphone; photo-electromotive-force sensors; pulsed laser vibrometer; surface displacements; Acoustic beams; Acoustic pulses; Acoustic signal detection; Holographic optical components; Microphones; Mirrors; Optical pulses; Optical surface waves; Surface emitting lasers; Vibrometers; (090.2880) Holographic interferometry; (110.5125) Photoacoustics; (120.7280) Vibration analysis;
Conference_Titel :
Lasers and Electro-Optics, 2008 and 2008 Conference on Quantum Electronics and Laser Science. CLEO/QELS 2008. Conference on
Conference_Location :
San Jose, CA
Print_ISBN :
978-1-55752-859-9
