A study on the development of transmission-type extrinsic Fabry-Perot interferometric optical fiber sensor

Kim, Sang-Hoon; Lee, Jung Ju; Lee, Dong-Chun; Kwon, Il‐Bum

doi:10.1109/50.793768

Cited by 28 publications

(8 citation statements)

References 12 publications

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“…Figure 4 shows the comparison between the reflection-type sensor signal and the linear combination signal from the experiment that used the precise translation device. The sensor coefficient was 2.308, which minimized the fringe amplitude within 45-90 µm of the optimum gap range for the transmission-type EFPI sensor [9]. The fringe peaks and valleys of the linear combination signal were shown to have some phase shifts in comparison with the reflection-type sensor signal.…”

Section: Parameter Design Of Signal Processingmentioning

confidence: 97%

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Parameter design of signal processing for transmission/reflection-type hybrid extrinsic Fabry–Perot interferometric optical fiber sensors

Kim¹,

Lee²

2004

Smart Mater. Struct.

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A transmission/reflection-type hybrid extrinsic Fabry-Perot interferometric (TRHEFPI) optical fiber sensor presents transmission-type and reflection-type sensor signals simultaneously, and measurement directions can be robustly distinguished with the phase lead or lag of the linear combination signal from the original sensor signal. This sensor principle compensates for the ambiguous distinction of the measurement directions and direction changes of conventional interferometric optical fiber sensors, including extrinsic Fabry-Perot interferometric optical fiber sensors, due to the exclusive use of fringe counting in signal processing. Designing a sensor coefficient in the linear combination signal is one of the most important works in signal processing for the TRHEFPI optical fiber sensor because the magnitude of the phase shifts depends on the sensor coefficient. A design method of the sensor coefficient is presented in this research. The method was verified with experimental sensor signals and applied to strain measurement experiments. A method of absolute measurement using the TRHEFPI optical fiber sensor is also presented.

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Section: Parameter Design Of Signal Processingmentioning

confidence: 97%

“…The transmission-type EFPI (TEFPI) optical fiber sensor has been developed by Kim et al [9]. The sensor signal presents not only the interferometric fringes from measurement quantity but also the signal level variation from measurement directions.…”

Section: Introductionmentioning

confidence: 99%

Parameter design of signal processing for transmission/reflection-type hybrid extrinsic Fabry–Perot interferometric optical fiber sensors

Kim¹,

Lee²

2004

Smart Mater. Struct.

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“…The alignment is achieved with the capillary tube where the diameter is slightly greater than the cladding diameter of the optical fibre. This structure is of simple implementation and has several applications [3][4][5][6]. Many configurations of intrinsic fibre Fabry-Perot interferometers have been proposed in recent years.…”

Section: Introductionmentioning

confidence: 99%

Interrogation of a fibre Fabry–Perot interferometer using a π-shifted Bragg grating

Silva¹,

Frazão²,

Ferreira³

et al. 2008

Meas. Sci. Technol.

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A robust all-fibre interferometric interrogation technique based on the wavelength modulation of a π-shifted fibre Bragg grating is proposed. The concept is demonstrated for strain measurement using a Bragg-grating-based Fabry–Perot interferometer. The strain–phase relationship is shown to be linear with a sensitivity slope of (2.19 ± 0.02)°/με. A strain resolution of ≈2.4 µε is demonstrated.

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“…Tran et al [3] showed that the absolute extrinsic Fabry-Perot interferometer (AEFPI) could measure an absolute displacement and the dynamic strain, but it has low resolution and requires some additional devices, such as a broadband source and an optical spectrum analyser. Kim et al [4] measured the dynamic strain using a transmission-type EFPI. However, it has the disadvantage that the transmitted light must be detected to measure the strain, and as a result the measurement system is more complicated than that detects the reflected light.…”

Section: Introductionmentioning

confidence: 99%

Measuring dynamic strain of structures using a gold-deposited extrinsic Fabry Perot interferometer

Kim

Park²,

Kang³

et al. 2002

Smart Mater. Struct.

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In this paper, we present a new type of extrinsic Fabry-Perot interferometer (EFPI) for measurement of dynamic strain. Gold was deposited on the second reflecting surface of the optical fibre in this sensor to increase its reflectivity. Thus, we have termed it a gold-deposited extrinsic Fabry-Perot interferometer (G-EFPI). If a gap between two reflecting surfaces increases, the loss of intensity of the light that passes through the gap increases, causing a subsequent decrease in the output intensity of the sensor. Conversely, if the gap decreases, the amount of loss decreases and the output intensity increases. Therefore, it is possible to determine the variation of the gap size by observing the output intensity of the sensor. Finally, the dynamic strain of a composite specimen was measured successfully using the G-EFPI.

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A study on the development of transmission-type extrinsic Fabry-Perot interferometric optical fiber sensor

Cited by 28 publications

References 12 publications

Parameter design of signal processing for transmission/reflection-type hybrid extrinsic Fabry–Perot interferometric optical fiber sensors

Parameter design of signal processing for transmission/reflection-type hybrid extrinsic Fabry–Perot interferometric optical fiber sensors

Interrogation of a fibre Fabry–Perot interferometer using a π-shifted Bragg grating

Measuring dynamic strain of structures using a gold-deposited extrinsic Fabry Perot interferometer

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