Nondisturbing transverse acoustic sensor based on weak measurement in Mach–Zehnder interferometer

Dongmei Li; Tian Guan; Jingying Jiang; Yonghong He

doi:10.1117/1.OE.56.3.034107

20 March 2017 Nondisturbing transverse acoustic sensor based on weak measurement in Mach–Zehnder interferometer

Dongmei Li, Tian Guan, Jingying Jiang, Yonghong He

Author Affiliations +

Optical Engineering, Vol. 56, Issue 3, 034107 (March 2017). https://doi.org/10.1117/1.OE.56.3.034107

Abstract

We proposed an optical sensing scheme, based on the mechanism of weak measurement, to detect the sonic pressure transversally without any disturbance. According to the theory of weak measurement in frequency domain, a tiny phase difference between the two eigenstates of the system could be detected, depending on the shift of central wavelength of output spectra. The optical path difference between two paths of a Mach–Zehnder interferometer is induced by the varied acoustic waves propagating in liquid. The propagating direction of the testing light beam is orthogonal to that of the acoustic wave. Thus, the phase shift corresponding to the changing acoustic pressure could be monitored transversally. The experiment with the hydrophone is implemented as a reference to demonstrate the feasibility and authenticity of this weak measurement scheme. With this method, an optical phase resolution of 1.12×10−5 rad was acquired in such a weak measurement system.

Citation Download Citation

Dongmei Li, Tian Guan, Jingying Jiang, and Yonghong He "Nondisturbing transverse acoustic sensor based on weak measurement in Mach–Zehnder interferometer," Optical Engineering 56(3), 034107 (20 March 2017). https://doi.org/10.1117/1.OE.56.3.034107

Received: 2 December 2016; Accepted: 2 March 2017; Published: 20 March 2017

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