Noise equivalent pressure of a 1550 nm fiber laser as an underwater acoustic sensor dedicated to high depth

Orsal, B.; Ouarets, Shiraz; Vacher, R.; Dureisseix, David

doi:10.1109/icnf.2011.5994329

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B Frequency Noise Spectral Density1

B Noise Equivalent Power Versus Membrane Thickness1

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2013

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“…Hence, the dependence of the frequency noise spectral density S ν (f,λ) is shown in Fig.5. Our experimental values are in concordance with experimental values given by Kirkendall [7], Orsal [8].…”

Section: B Frequency Noise Spectral Densitysupporting

confidence: 92%

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Noise equivalent pressure of an novel acousto-optical system dedicated to Deep Sea

Souici

Orsal

Wattrisse

et al. 2013

2013 22nd International Conference on Noise and Fluctuations (ICNF)

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Sensors based on optical fibers have well known advantages over conventional electromechanical sensors. They offer electrically passive operation and immunity from electromagnetic fields because the fiber is entirely made with dielectric materials. We present a novel acousto-optic system structure. The pump laser, circulator and receiver system including one interferometer used as discriminator, must be placed on electronic board with low electric consumption (< 1A). It is demonstrated we can detect very low acoustic signal, the same level as Deep Sea State Zero Noise if the acoustooptical sen sitivity is sufficient high. Hence, the Noise equivalent pressure of this novel acoustooptical system is optimized .

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Section: B Frequency Noise Spectral Densitysupporting

confidence: 92%

“…We note the signal to noise ratio ASNR is maximum and tends to the values given by a simplified relationship (17) when the sensitivity is sufficient high [7], [8]:…”

Section: B Noise Equivalent Power Versus Membrane Thicknessmentioning

confidence: 99%