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.
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Wooler et al. (2007) studied this question.
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