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Indexed by:期刊论文

Date of Publication:2010-03-10

Journal:CHINESE OPTICS LETTERS

Included Journals:SCIE、EI、ISTIC、Scopus

Volume:8

Issue:3

Page Number:266-269

ISSN No.:1671-7694

Abstract:A sensitive polymer diaphragm based fiber Fabry-Perot, (F-P) sensor for aeroacoustic wave measurement is presented A novel polymer material poly (phthalazmone ether sulfone ketone) (PPESK) diaphragm is used as the acoustic sensing element The effective dimensions of the diaphragm are 4 mm m diameter and 6 mu m in thickness. Owing to the good mechanical and optical features of the diaphragm and application of the interferometric/intensity demodulation, a system sensitivity of 31 mV/Pa is achieved in the frequency range of 0 1-12.7 kHz, and a signal-to-noise ratio (SNR) of 29 dB at 1 kHz is obtained The linear response of the sensor is from 0 35 to 2.82 Pa, corresponding to 85 103 dB sound pressure level (SPL) (re 20 p mu Pa) The sensor has the potential to be used as a universal and low-cost of microphone.