2F-4 A Fabry-Perot Fibre-Optic Hydrophone for the Measurement of Ultrasound Induced Temperature Change

Morris, Paul; Hurrell, Andrew; Zhang, E.; Rajagopal, Srinath; Beard, Paul C.

doi:10.1109/ultsym.2006.139

Cited by 8 publications

(13 citation statements)

References 6 publications

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“…For a fixed interrogation wavelength, this dependence can be used to recover temperature by monitoring the accompanying change in the reflected signal power; see, e.g., [33]. recently, Morris et al reported a technique in which both temperature and pressure could be recovered from a FabryPerot fiber-optic hydrophone [34], [35]. The temperature was extracted from low-frequency changes in the reflected optical power at the optimum interrogation wavelength based on an a priori calibration.…”

Section: Fabry-perot Temperature Measurementmentioning

confidence: 99%

Measurement of Broadband Temperature-Dependent Ultrasonic Attenuation and Dispersion Using Photoacoustics

Treeby

Cox

Zhang

et al. 2009

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

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The broadband ultrasonic characterization of biological fluids and tissues is important for the continued development and application of high-resolution ultrasound imaging modalities. Here, a photoacoustic technique for the transmission measurement of temperature-dependent ultrasonic attenuation and dispersion is described. The system uses a photoacoustic plane wave source constructed from a polymethylmethacrylate substrate with a thin optically absorbent layer. Broadband ultrasonic waves are generated by illuminating the absorbent layer with nanosecond pulses of laser light. The transmitted ultrasound waves are detected by a planar 7-microm high-finesse Fabry-Perot interferometer. Temperature-induced thickness changes in the Fabry-Perot interferometer are tracked to monitor the sample temperature and maintain the sensor sensitivity. The measured -6 dB bandwidth for the combined source and sensor is 1 to 35 MHz, with an attenuation corrected signal level at 100 MHz of -10 dB. The system is demonstrated through temperature-dependent ultrasound measurements in castor oil and olive oil. Power law attenuation parameters are extracted by fitting the experimental attenuation data to a frequency power law while simultaneously fitting the dispersion data to the corresponding Kramers-Krönig relation. The extracted parameters are compared with other calibration measurements previously reported in the literature.

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Section: Fabry-perot Temperature Measurementmentioning

confidence: 99%

Measurement of Broadband Temperature-Dependent Ultrasonic Attenuation and Dispersion Using Photoacoustics

Treeby

Cox

Zhang

et al. 2009

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

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“…19.20 illustrates, this results in a complicated aperiodic response that is rather less amenable to intuitive interpretation than the frequency response of the Eisenmenger FOH. The maximum at 22 MHz has, however, been identifi ed as being most likely a resonance associated with the Rayleigh wave propagating along the FPI-water interface (Morris, 2008). Note that, although the frequency response of the fl at tipped sensor in Fig.…”

Section: Fabry Perot Polymer Fi Lm Fi Bre-optic Hydrophonementioning

confidence: 99%

“…19.20 shows, the frequency response of the fl at fi bre tip is non-uniform with several irregularly spaced features. These features are a consequence of a variety of acoustic interactions which have been investigated by Morris (2008) using a fi nite difference elastic wave model (AFiDS, AMH Consulting, Poole, UK) to simulate the frequency response. In common with the Eisenmenger type FOH, the nature of the frequency response is a consequence of the interaction of the incident plane wave, its refl ection from the fi bre tip and the diffracted edge waves propagating across the fi bre endface.…”

Section: Fabry Perot Polymer Fi Lm Fi Bre-optic Hydrophonementioning

confidence: 99%

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Piezoelectric and fibre-optic hydrophones

Hurrell

Beard

2012

Ultrasonic Transducers

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“…Due to its high sensitivity and simple structure, the fiberoptic Fabry-Pérot Interferometer (FFPI) has widely known applications in pressure sensor, 1-3 temperature sensor, 4,5 chemo/biosensor, 6 acoustic and ultrasound measurement, [7][8][9] and magnetic field detection. 10,11 People have proposed several interrogation schemes for these FFPI sensors.…”

Section: Introductionmentioning

confidence: 99%

Phase-generated carrier demodulation scheme for fiber Fabry–Pérot interferometric sensor with high finesse

et al. 2011

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This paper presents a demodulation scheme using phasegenerated carrier (PGC) for a fiber Fabry-Pérot interferometric (FFPI) sensor with high finesse. The FFPI is constructed by a polarization maintaining fiber ring resonator with dual-coupler (PMDC-FRR), which can eliminate the polarization induced fading phenomenon. Compared with the former phase demodulation methods, the PGC scheme in this paper does not assume a two-beam interferometric approximation for the Fabry-Pérot cavity, and can work at arbitrary value of finesse in theory. Two PMDC-FRRs with reflective coefficients of 0.5 and 0.9 are made in experiments for demodulation. Both the single-frequency and the wideband signals are successfully demodulated from the transmission intensities using the PGC demodulation scheme. The experimental results demonstrate that the PGC demodulation scheme is feasible for the FFPI sensor with high finesse. The effects of the reflective coefficient and the intensity loss to the finesse are also discussed. C 2011 Society of Photo-Optical Instrumentation Engineers (SPIE).

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2F-4 A Fabry-Perot Fibre-Optic Hydrophone for the Measurement of Ultrasound Induced Temperature Change

Cited by 8 publications

References 6 publications

Measurement of Broadband Temperature-Dependent Ultrasonic Attenuation and Dispersion Using Photoacoustics

Measurement of Broadband Temperature-Dependent Ultrasonic Attenuation and Dispersion Using Photoacoustics

Piezoelectric and fibre-optic hydrophones

Phase-generated carrier demodulation scheme for fiber Fabry–Pérot interferometric sensor with high finesse

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