Fiber-optic vibration sensor based on wavefront-splitting interferometry

Hsien-Chi Yeh; Chun Fan Goh; Tian Fook Kong

doi:10.1117/12.666825

9 December 2005 Fiber-optic vibration sensor based on wavefront-splitting interferometry

Hsien-Chi Yeh, Chun Fan Goh, Tian Fook Kong

Proceedings Volume 6024, ICO20: Optical Devices and Instruments; 60240J (2005) https://doi.org/10.1117/12.666825
Event: ICO20:Optical Devices and Instruments, 2005, Changchun, China

Abstract

In this paper, we present the working principle and the preliminary results of a novel vibration sensor based on wavefront-splitting interferometry. The interference signal is formed by superposing the radiations within a compact sensor space at which the wavefront is split and reflected by the sample surface. The performance of sensor is determined by the geometrical dimensions, the polarization of the incident light and the optical properties of the sample surface. Due to the grazing incidence of the detecting light, the interference signal is strong and obvious regardless of the material of the sample surface. Therefore, this fiber-optic sensor is more sensitive than the other displacement and vibration sensors, especially when applied for the optically low-reflective samples. The experiments using the OHP transparency and the metal structures demonstrate the static and dynamic measurements of the fiber-optic sensor.

Citation Download Citation

Hsien-Chi Yeh, Chun Fan Goh, and Tian Fook Kong "Fiber-optic vibration sensor based on wavefront-splitting interferometry", Proc. SPIE 6024, ICO20: Optical Devices and Instruments, 60240J (9 December 2005); https://doi.org/10.1117/12.666825

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KEYWORDS

Fiber optics sensors

Sensors

Interferometry

Fiber optics

Ferroelectric materials

Transparency

Reflectivity

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