Title :
Extrinsic Fabry-Perot interferometer fiber-optic microphone
Author :
Fürstenau, N. ; Horack, H. ; Schmidt, W.
Author_Institution :
Inst. of Flight Guidance, German Aerosp. Res. Establ., Braunschweig, Germany
Abstract :
We describe a new fiber-optic microphone developed as a passive acoustic sensor for traffic monitoring and vehicle classification. It is based on a fiber-optic extrinsic Fabry Perot microinterferometer coupled to an external membrane for modulating the FP cavity length and a low coherent superluminescent diode as light source. Sensitivity and performance are comparable with standard condenser microphones
Keywords :
Fabry-Perot interferometers; fibre optic sensors; microphones; road vehicles; FP cavity length; Fabry-Perot interferometer; external membrane; fibre-optic microphone; passive acoustic sensor; superluminescent diode; traffic monitoring; vehicle classification; Acoustic sensors; Biomembranes; Fabry-Perot interferometers; Microphones; Monitoring; Optical coupling; Optical fiber sensors; Optical modulation; Superluminescent diodes; Vehicles;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 1997. IMTC/97. Proceedings. Sensing, Processing, Networking., IEEE
Conference_Location :
Ottawa, Ont.
Print_ISBN :
0-7803-3747-6
DOI :
10.1109/IMTC.1997.604021
