Title :
A microphone array using fiber Bragg gratings
Author :
Iida, T. ; Nakamura, Kentaro ; Ueha, S.
Author_Institution :
Precision & Intelligence Lab., Tokyo Inst. of Technol., Yokohama, Japan
Abstract :
We proposed an optical microphone array using fiber Bragg gratings (FBGs). Deformation of the diaphragm was transformed to the modulation in the center wavelength of the FBG. We demonstrated, the WDM operation of a four-element array microphone as well as the performances of the element microphone such as frequency response, linearity and sensitivity. To realize a simultaneous measurement for a large number of elements, the development of a special WDM detection system is required.
Keywords :
Bragg gratings; acoustic field; arrays; deformation; diaphragms; distributed sensors; fibre optic sensors; microphones; wavelength division multiplexing; FBG microphones; WDM detection system; diaphragm deformation; distributed sound field; fiber Bragg grating; fiber optic method; four-element array microphone; frequency response; linearity; optical microphone array; signal separation; sound field visualization; sound pressure sensitivity; sound source localization; wavelength division multiplexing; Bragg gratings; Fiber gratings; Frequency response; Linearity; Microphone arrays; Optical arrays; Optical modulation; Optical sensors; Wavelength division multiplexing; Wavelength measurement;
Conference_Titel :
Optical Fiber Sensors Conference Technical Digest, 2002. Ofs 2002, 15th
Conference_Location :
Portland, OR, USA
Print_ISBN :
0-7803-7289-1
DOI :
10.1109/OFS.2002.1000546
