SMS fiber structure for temperature measurement using an OTDR

Hatta, Agus Muhamad; Indriawati, Katherin; Bestariyan, T.; Humada, T.; Sekartedjo,

doi:10.1007/s13320-013-0104-9

Cited by 19 publications

(11 citation statements)

References 18 publications

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“…In this paper, we propose a novel configuration based on the SMS fiber structure and an optical time domain reflectometer (OTDR)-based interrogation technique for a long-range displacement measurement. The use of the OTDR as an interrogator for the SMS fiber structure strain and temperature sensor was proposed previously, and the capability of quasi-distributed or multi-point measurement was demonstrated [11,12]. In our configuration, the SMS fiber structure was installed on a flexible plate between two permanent poles.…”

Section: Introductionmentioning

confidence: 99%

Long-range displacement sensor based on SMS fiber structure and OTDR

et al. 2015

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This paper presents a long-range displacement measurement method by using a singlemulti-single mode (SMS) fiber structure, attached to a flexible plate between two permanent poles and the optical time domain reflectometer (OTDR)-based interrogator. The SMS fiber structure sensors are prepared with two different configurations, i.e. straight and sinusoidal configurations. It is demonstrated that the displacement sensor can perform a displacement measurement with a range from 0 mm to 150 mm with a resolution of 0.159 mm. The sinusoidal configuration provides a better sensitivity than the straight configuration. The proposed sensor offers a low cost, and it can be implemented for quasi-distributed displacement measurement which is suitable for civil structure monitoring.

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Section: Introductionmentioning

confidence: 99%

Long-range displacement sensor based on SMS fiber structure and OTDR

et al. 2015

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“…It is the case of a recent experimental investigation addressing temperature measurement using the SMS structure as the temperature sensor and interrogated by an OTDR [6]. Here, we proceed with this research path, but now exploring the characteristics associated with the processing of the OTDR ghost signal, enhanced by considering a fiber loop mirror (FLM) at the far end of the fiber, with the sensing device for intensity measurement based on a SMS structure.…”

Section: Introductionmentioning

confidence: 99%

“…It provides an additional signal path between the array elements, which effectively cancels the external coupling between them. Various implementations of decoupling networks have been described in the literature [4][5][6][7][8][9]. A systematic design approach for larger circulant symmetric arrays has also been proposed [10].…”

Section: Introductionmentioning

confidence: 99%

Fiber optic displacement sensor based on a double-reflecting OTDR technique

Giraldi

Fernandes

Ferreira

et al. 2015

Microw. Opt. Technol. Lett.

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In this work, it is proposed a technique to implement an intensity sensor based on the generation of a double‐reflecting (ghost) signal in optical time domain reflectometry (OTDR). The intensity sensor is supported by a singlemode‐multimode‐singlemode (SMS) fiber structure combined with a fiber loop mirror (FLM). The results of the displacement sensitivity show linear behavior for both the first‐reflecting and double‐reflecting signals with linear slopes of approximately −4.5 dB/mm and −6 dB/mm, respectively. The displacement resolution achieved is ∼0.28 mm. It is also found that the system is able to read periodic displacement variations in the millisecond time scale applied to the sensing head. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:1312–1315, 2015

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“…Finally, a significant function of the OTDR is to enable multiplexing [7][8][9] and remote sensing [8][9][10] interrogation. OTDR trace loss [8,[11][12][13] or reflection peak variation [7,10] are the most attractive techniques for interrogation when OTDR is used. In the case of the OTDR trace loss and considering multiplexing and remote sensing, there is a compromise between the number of sensors to be multiplexed and the distance between sensors since the loss introduced by the sensors will be a serious limitation to the system.…”

Section: Introductionmentioning

confidence: 99%

Fiber Loop Mirror Sensors Interrogated and Multiplexed by OTDR

Giraldi

Fernandes

Ferreira

et al. 2015

J. Lightwave Technol.

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In this work two techniques for interrogation and multiplexing of fiber loop mirror (FLM) intensity sensors based on Optical Time Domain Reflectometer (OTDR) are proposed. These configurations enable series and parallel FLM sensor interrogation. A fiber taper characterized as a displacement sensor was used as the intensity sensor. The OTDR parameters were optimized in order to obtain the best results. The optimized parameters were 100 ns pulse width and 10 dB input signal attenuation which permitted to attain ~18 dB dynamic range in the operating wavelength of 1550 nm. The results show a linear behavior for both configurations with similar slope, -15.3 dB/mm, in the normalized displacement range of 0.2 mm to 0.7 mm. It was also achieved a displacement resolution of 0.027 mm and 0.093 mm, for the series and parallel configurations, respectively. Sensors multiplexing are demonstrated for both configurations and the systems do not present crosstalk. Based on the experimental results, the best configuration is the parallel one. The proposed approach is a viable alternative for multiplexing and interrogation of remote fiber sensors. Index Terms-Optical fiber sensor, Fiber loop mirror, Sensor Interrogation, OTDR.The authors would like to thank CAPES (Project BEX 4463/13-7) and

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SMS fiber structure for temperature measurement using an OTDR

Cited by 19 publications

References 18 publications

Long-range displacement sensor based on SMS fiber structure and OTDR

Long-range displacement sensor based on SMS fiber structure and OTDR

Fiber optic displacement sensor based on a double-reflecting OTDR technique

Fiber Loop Mirror Sensors Interrogated and Multiplexed by OTDR

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