A Large Dynamic Range Interferometric Fiber Strain Sensor

Zhang, Liang; Zhu, Zijue; Yin, Mengke; Dong, Yuanhua

doi:10.1109/icocn.2019.8934007

Cited by 1 publication

(1 citation statement)

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“…Previously, we have presented a method of visibility modulation associated with strain sensing [23,24]. In this paper, we propose a demodulation scheme based on measuring interference fringe visibility, and demonstrate it by a specially designed interferometric scheme, where a section of highly birefringent fiber (HBF) and FBG were spliced together to function as the sensing element.…”

Section: Introductionmentioning

confidence: 99%

A Demodulation Scheme Based on Measuring Interference Fringe Visibility With a Highly Birefringent Fiber Based Michelson Interferometer

et al. 2021

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We propose a novel demodulation scheme based on measuring interference fringe visibility and demonstrate it using a typical Michelson interferometer (MI) configuration. The key component to achieve the scheme is a section of highly birefringent fiber (HBF) spliced into the sensing arm to function as the sensing element. The optical path difference (OPD) leads to interference fringes, while the birefringence of the HBF results in a visibility envelop. It is possible to detect measurands associated with birefringence through measuring the visibility, which is attributed to a flexible use of the fundamental principle of interferometry. As one of the potential applications, temperature sensing employing the MI configuration is performed. Moreover, the technique has the advantage of being immune to element instabilities, such as power fluctuation of the light source, phase shift of the reference arm, noise of the photo detector, and wavelength shift of the optical spectrum analyzer (OSA). This work may provide an alternative method to achieve high precision interferometry with low cost.

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Section: Introductionmentioning

confidence: 99%