Acoustic properties of a fibre-laser microphone

In this paper we present the design of an optical microphone incorporating a distributed feedback fibre-laser sensor. The acoustic frequency response of the device is characterized at low frequencies (up to 250 Hz) and found to deliver a wavelength responsivity of -62 dB re 1 nm Pa-1. Experimental r...

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Bibliographic Details
Published in:Measurement science & technology 2007-03, Vol.18 (3), p.884-888
Main Authors: Wooler, J P F, Hodder, B, Crickmore, R I
Format: Article
Language:English
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Summary:In this paper we present the design of an optical microphone incorporating a distributed feedback fibre-laser sensor. The acoustic frequency response of the device is characterized at low frequencies (up to 250 Hz) and found to deliver a wavelength responsivity of -62 dB re 1 nm Pa-1. Experimental results are compared to a theoretical description of the device that is based upon a mass-spring model.
ISSN:0957-0233
1361-6501
DOI:10.1088/0957-0233/18/3/042