2019
DOI: 10.1364/ao.58.005859
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Microfiber coupler with a Sagnac loop for water pollution detection

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Cited by 7 publications
(7 citation statements)
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“…Ring-shape OMC Chloride ion concentrations 20-60‰ 423 pm/‰ Detection limit: 0.447‰ [ 254] was placed in a fluid channel and fixed with polydimethylsiloxane (PDMS). After that, they investigated the interference spectrum and sensitivity around DTP of OMC and found that the DTP depended on the width of the coupler and SRI.…”
Section: Structures and Sensing Applicationsmentioning
confidence: 99%
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“…Ring-shape OMC Chloride ion concentrations 20-60‰ 423 pm/‰ Detection limit: 0.447‰ [ 254] was placed in a fluid channel and fixed with polydimethylsiloxane (PDMS). After that, they investigated the interference spectrum and sensitivity around DTP of OMC and found that the DTP depended on the width of the coupler and SRI.…”
Section: Structures and Sensing Applicationsmentioning
confidence: 99%
“…In the light of the preparation methods, optical fiber couplers based on two SMFs couplings can be divided into four types: Parallel structure microfiber coupler, [ 247–250 ] double helix microfiber coupler, [251] twisted microfiber coupler [252] and loop fiber coupler, [ 246,253,254 ] as shown in Figure . The first three optical fiber couplers belong to the transmissive structure, and the last one belongs to the reflective structure.…”
Section: Optical Fiber Optofluidic Bio‐chemical Sensors Based On Opti...mentioning
confidence: 99%
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“…In optical fiber sensing, the basic component of a Vernier effect scheme is an interferometric optical fiber structure. By carefully selecting an appropriate cascade of structures as well as their parameters, a 'strong' Vernier effect can be achieved leading to a large increase in the sensor sensitivity [7] [8], an improvement which can potentially be applied to a wide range of applications currently using the optical fiber interferometers, including environmental monitoring, Earth geology, biological detection, aerospace and navigation [9] T loop is formed by an optical fiber coupler which splits the input light into two beams which then counter-propagate within the polarization-maintaining fiber (PMF) loop and accumulate a phase difference before re-combining at the coupler and interfering with each other due to the acquired phase difference [14] [15]. The Vernier effect was achieved by angle shift splicing two PMFs in a single Sagnac interferometer loop and the temperature sensitivity was −2.44 nm/°C, which is 14.96 times greater compared with the Sagnac sensor without the Vernier effect (−0.163 nm/°C) [16].…”
mentioning
confidence: 99%
“…Ambient RI changes in such a configuration impact both of the beams counter-propagating through the MFC and influence the output interference spectrum of the PMF loop. For example, Zu et al proposed an MFC in a Sagnac loop for detection of water pollutants with sensitivity of 423 pm/‰ [9]. Bai et al proposed a microfiber Sagnac loop for simultaneous measurement of temperature and relative humidity, and demonstrated the sensitivities of 176.6 pm/% RH and -123.5 pm/°C respectively [22].…”
mentioning
confidence: 99%