A New Kind of Laser Microphone for Photoacoustic Applications
Abstract
We present in this paper a new kind of laser-based microphone device capable of detecting minute displacements of the microphone diaphragm, leading to drastically improved sensitivity in detecting the impinging pressure waves like acoustic waves and water waves over existing state-of-the-art laser and fiber-optic microphones. The drastically improved sensitivity in detecting diaphragm surface displacements of the novel laser microphone leads to niche applications including the photoacoustic detection of molecules and compounds with long standoff detection distances as well as highly sensitive technology for monitoring submarine activities. Preliminary experimental demonstration of the novel laser microphone technology is presented, validating the theoretical modeling that is also presented.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 2008
- Accession Number
- ADA504475
Entities
People
- Chen-chia Wang
- Feng Jin
- Narasimha S. Prasad
- Sudhir Trivedi
- V. Swaminathan
Organizations
- United States Army Armament Research, Development and Engineering Center