Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2010-03-10

Journal: CHINESE OPTICS LETTERS

Included Journals: Scopus、ISTIC、EI、SCIE

Volume: 8

Issue: 3

Page Number: 266-269

ISSN: 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.