An Improved Polymer Shell Encapsulated Fiber Laser Hydrophone

Vivek, K; Rajesh, R.; Sreehari, C. V.; Santhanakrishnan, T.; Kumar, S Sham; Praveen, T. V.; Sundar, R.; Moosad, K. P. B.

doi:10.1109/jsen.2017.2777900

Cited by 15 publications

(4 citation statements)

References 28 publications

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“…Results are verified with that of the traditional HTV system and found that the proposed LTV system has the advantages over the conventional HTV system. Case study carried out on PZT sensors suggests that the proposed LTV technique has potential utility in other underwater sensors especially optical sensors 31 .…”

Section: Discussionmentioning

confidence: 99%

Low Temperature Vulcanisation Technique for CR BIIR Blend for Encapsulation of Oceanic Sensors

2020

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Blend of chloroprene rubber (CR) and bromobutyl rubber (BIIR) is used for encapsulation of piezo sensors used in sea water. Conventional encapsulation method of these sensors involving high temperature vulcanisation (HTV) often leads to deterioration of piezo properties due to thermal degradation. This paper reports a low temperature vulcanisation (LTV) technique carried out at 90 °C for CR-BIIR blend using chlorinated polyethylene (CPE) as compatibiliser and LTV system consisting of modified di-o-tolyl guanidine and thiocarbanilide as accelerators and ZnO as curing agent. The conventionally used scavenger MgO was eliminated and only ZnO was used to boost the cure reaction. Properties specific to sonar sensors, namely, acoustic transparency, electrical resistivity, water absorption and physico‑mechanical properties were evaluated besides evaluation of morphology. The results are found to compare better than the conventional blend. Accelerated thermal ageing at 70 °C for 7 days yielded 97 % retention of tensile strength. The technique was implemented in a PZT hydrophone sensor and was successfully underwater tested.

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Section: Discussionmentioning

confidence: 99%

Low Temperature Vulcanisation Technique for CR BIIR Blend for Encapsulation of Oceanic Sensors

2020

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“…The sensitivity, bandwidth and the size of the hydrophones are mainly determined by their transduction mechanisms. A wide range of methods has been employed in designing and fabrication of hydrophones such as optical systems [10][11][12], piezoresistive materials [13,14] and piezoelectric material [15,16].…”

Section: Introductionmentioning

confidence: 99%

“…Recent research have tended to focus more on piezoresistor and fibre laser hydrophones [11,14] and have paid far too little attention to design new high-sensitivity piezoelectric hydrophones. However, to meet the desired performance, attempts have been made by some research groups to enhance the sensitivity of the piezoelectric hydrophones.…”

Section: Introductionmentioning

confidence: 99%

Design and simulation of a flat cap mushroom shape microelectromechanical systems piezoelectric transducer with the application as hydrophone

Amiri

Kordrostami

Ghoddus

2020

IET Science, Measurement & Technology

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“…Liang et al utilized fibre-laser-based ultrasound sensor for photoacoustic imaging [20]. Vivek et al improved the packaging of fibre laser by polymer shell encapsulation for better practical applications [21]. However, the necessity of an unbalanced interferometer and phase modulator adds to the sensor complexity.…”

Section: Introductionmentioning

confidence: 99%

S-shaped microfiber based diaphragm supported optical microphone

2019

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We propose and demonstrate a simple and highly sensitive optical microphone based on S-shaped tapered fibre (STF). The short pigtailed end of the STF is attached to the centre of a thin circular nitrile diaphragm. The applied acoustic signal deforms the nitrile diaphragm and due to the affixation, the STF structure gets modified leading to change in the bending angles of the two STF bends. As a consequence, the photodetector output, detecting the reflected light intensity of the STF, varies in accordance with the applied acoustic signal. Various properties of the proposed sensing setup can be easily tailored by changing the diaphragm diameter and thickness, and the shapes and size of the STF. For an optimized configuration, the proposed sensor achieves a sensitivity of 3.07 mV Pa −1 and a minimum detectable pressure of 36.48 mPa Hz −1 . The sensor shows a linear behaviour up to 1300 Hz and the experimental value of its first order natural frequency is

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An Improved Polymer Shell Encapsulated Fiber Laser Hydrophone

Cited by 15 publications

References 28 publications

Low Temperature Vulcanisation Technique for CR BIIR Blend for Encapsulation of Oceanic Sensors

Low Temperature Vulcanisation Technique for CR BIIR Blend for Encapsulation of Oceanic Sensors

Design and simulation of a flat cap mushroom shape microelectromechanical systems piezoelectric transducer with the application as hydrophone

S-shaped microfiber based diaphragm supported optical microphone

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