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A novel optical multilayer hydrophone with a triangular pyramid substrate

A novel optical multilayer hydrophone with a triangular pyramid substrate
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摘要 A novel concept for an optical multilayer ultrasonic hydrophone with the sensing film deposited on a triangular pyramid glass substrate is proposed. Using the calculation model for the spectral coefficients' derivatives of a dielectric multilayer optical coating, the acousto-optic sensitivity characteristic of the hy- drophone is analyzed with different measurement laser polarizations and incident angles. We present a reasonable method and adjusting strategy for the optimum working point selection of the ultrasound mea- surement. Analytic results show that the novel hydrophone possesses all the other merits of a plate glass substrate optical multilayer hydrophone but with improved detection sensitivity. A longer measurement time without distortion decreases the difficulty of high frequency signal circuits. Spatial split of the ultra- sound signal caused by the substrate's triangular pyramid roof simplifies the spatial spot area correction, which contributes to the accurate calibration of the hydrophone's wideband frequency response. A novel concept for an optical multilayer ultrasonic hydrophone with the sensing film deposited on a triangular pyramid glass substrate is proposed. Using the calculation model for the spectral coefficients' derivatives of a dielectric multilayer optical coating, the acousto-optic sensitivity characteristic of the hy- drophone is analyzed with different measurement laser polarizations and incident angles. We present a reasonable method and adjusting strategy for the optimum working point selection of the ultrasound mea- surement. Analytic results show that the novel hydrophone possesses all the other merits of a plate glass substrate optical multilayer hydrophone but with improved detection sensitivity. A longer measurement time without distortion decreases the difficulty of high frequency signal circuits. Spatial split of the ultra- sound signal caused by the substrate's triangular pyramid roof simplifies the spatial spot area correction, which contributes to the accurate calibration of the hydrophone's wideband frequency response.
出处 《Chinese Optics Letters》 SCIE EI CAS CSCD 2011年第1期86-89,共4页 中国光学快报(英文版)
关键词 Frequency response Glass HYDROPHONES MULTILAYERS Optical coatings Spectroscopy Substrates Ultrasonic applications Ultrasonic waves ULTRASONICS Frequency response Glass Hydrophones Multilayers Optical coatings Spectroscopy Substrates Ultrasonic applications Ultrasonic waves Ultrasonics
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参考文献10

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