2016
DOI: 10.1364/boe.7.004171
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All-optical highly sensitive akinetic sensor for ultrasound detection and photoacoustic imaging

Abstract: A novel all-optical akinetic ultrasound sensor, consisting of a rigid, fiber-coupled Fabry-Pérot etalon with a transparent central opening is presented. The sensing principle relies exclusively on the detection of pressure-induced changes of the refractive index in the fluid filling the Fabry-Pérot cavity. This enables resonance-free, inherently linear signal detection over a broad bandwidth. We demonstrate that the sensor achieves a exceptionally low peak noise equivalent pressure (NEP) values of 2 Pa over a … Show more

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Cited by 95 publications
(57 citation statements)
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“…5) are comparable to NEP of the wideband photoacoustic detector array based on a 2-D Fabry-Perot interferometer (0.2 kPa). 16 However, the technologies of single-element purely optical detection of an US are generally much more superior allowing NEPs of 2 to 20 Pa. 17,18 As compared with an earlier reported PPA unit 8 based on a 100-μm-thick PVDF film, our PE LDA and FC LDA units are based on a 25-and 28-μm-thick PVDF films. The main advantage of using the thinner PVDF film is an improved AR (420 μm for PPA, 8 40 μm for PE LDA, and 80 μm for FC LDA).…”
Section: In Vivo Imaging and The Noise Equivalent Pressurementioning
confidence: 89%
“…5) are comparable to NEP of the wideband photoacoustic detector array based on a 2-D Fabry-Perot interferometer (0.2 kPa). 16 However, the technologies of single-element purely optical detection of an US are generally much more superior allowing NEPs of 2 to 20 Pa. 17,18 As compared with an earlier reported PPA unit 8 based on a 100-μm-thick PVDF film, our PE LDA and FC LDA units are based on a 25-and 28-μm-thick PVDF films. The main advantage of using the thinner PVDF film is an improved AR (420 μm for PPA, 8 40 μm for PE LDA, and 80 μm for FC LDA).…”
Section: In Vivo Imaging and The Noise Equivalent Pressurementioning
confidence: 89%
“…CW interferometry is sensitive to temperature drifts and vibrations [42]. More details about the limitations of optical ultrasound detection techniques are given in [42,[176][177][178]. Performance comparison between different optical ultrasound detectors is summarized in Table 6.…”
Section: Optical Ultrasound Detection Technologiesmentioning
confidence: 99%
“…The optical microphone does not have any moving parts, as is normally the case for conventional US receivers (piezoelectric material or membrane). It measures the US directly in the air by measuring the change of the refractive index as acoustic waves travel through the Fabry-Pérot etalon [18,[25][26][27]. However, the housing of the microphone itself (or the etalon mirrors) can have a certain natural behavior which could affect the signal.…”
Section: Description Of Lurs Setupmentioning
confidence: 99%