A novel demodulation scheme for high precision quasi-distributed sensing system based on chaotic fiber laser

Zhang, Jun; Yang, Liping; Yang, Huanhuan; Zhang, Li; Wang, Juanfen; Zhang, Zhaoxia

doi:10.1016/j.sna.2015.07.033

Cited by 7 publications

(2 citation statements)

References 19 publications

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“…simple technology, low production cost [11], light weight, and immunity to light source oscillations [12]. These features allowed for developments in multiple areas, and applications include fiber and nonlinear optics, laser physics [11], secure optical communications [13], random number generation [14], fiber fault detection [15][16][17][18][19], and sensing [20][21][22]. For sensing, optical random signals were used for compressive sensing [22].…”

Section: Modified Microspheres For Random Lasingmentioning

confidence: 99%

A Brief Review of New Fiber Microsphere Geometries

Gomes

Monteiro

Silveira

et al. 2018

Fibers

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A brief review of new fiber microsphere geometries is presented. Simple microspheres working as Fabry-Perot cavities are interrogated in reflection and in transmission. Two microspheres were also spliced together, and subjected to different physical parameters. These structures are an alternative solution for load measurement and, when read in transmission, it is also possible to apply strain. Moreover, the structure is capable of being used under extreme ambient temperatures up to 900 • C. Random signal in cleaved microspheres was demonstrated with the possibility of using it for random laser or sensing applications. All this work was developed at the Centre for Applied Photonics, INESC TEC.

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Section: Modified Microspheres For Random Lasingmentioning

confidence: 99%

A Brief Review of New Fiber Microsphere Geometries

Gomes

Monteiro

Silveira

et al. 2018

Fibers

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“…For example, a cross-correlation method applied to a random reference signal and a probe signal allowed to interrogate a large network of chirped fiber Bragg gratings for strain sensing and also to obtain the precise location of each sensor [8]. The same technique was employed to analyze weak fiber Bragg gratings by using a chaotic fiber laser as an optical source [14]. The correlation method can as well be implemented with random signals in the spectral domain.…”

Section: Introductionmentioning

confidence: 99%

Cleaved Silica Microsphere for Temperature Measurement

Gomes

Silveira

Dellith

et al. 2018

IEEE Photon. Technol. Lett.

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A sensing structure based on a cleaved silica microsphere is proposed for temperature sensing. The microsphere was cleaved using focused ion beam milling. The asymmetry in the structure introduced by the cut generates not only new cavities but also random interferometric reflections inside the microsphere. These two spectral components can be separated using low-pass and high-pass filters, respectively. The sensor response to temperature can be extracted from the cavities' component using a correlation method. The device achieved a temperature sensitivity of −10.8 ± 0.2 pm/°C between 30 °C and 80 °C. The same effect is impossible to be obtained in a normal uncleaved microsphere. The random interferometric component did not provide any information on temperature using the same analysis. However, when changing the temperature, a new and completely distinct reflection spectrum with no apparent correlation with others at different temperatures was achieved.

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