RI Ring Laser Sensor Based on Concatenating CLF and SMF With One Core-Offset Joint

Xing, Rui; Wang, Zixiao; Gao, Yixiao; Qi, Yanhui; Jian, Shuisheng

doi:10.1109/lpt.2016.2537367

Cited by 10 publications

(5 citation statements)

References 15 publications

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“…Several works employ tapered optical fibers WSF for RI sensing purposes [41,42,77,78,[81][82][83]. Other alternatives employ optical fiber structures with miss-match core sections, then the light that interacts with the surrounding medium is higher and provides attractive characteristics [33,41,79,80,[84][85][86][87][88][89]. For example, Bin Yin et al propose an FBG and multimode fiber (MMF) integration to detect three parameters, inclusive of RI [38].…”

Section: Refractive Index Fiber Laser Sensorsmentioning

confidence: 99%

“…In the last decades, several research groups have employed different optical fiber structures as sensing heads in fiber laser sensors: tapers [27], multimode interference filters [28], and all fiber interferometers [29][30][31][32]; these elements improve the possibility of tuning a lasing mode. As a consequence, multiple parameters have been detected using fiber laser sensors: refractive index [33,34], curvature [35,36], strain [37][38][39], temperature [40][41][42][43][44], magnetic field [45,46], liquid level [27,47], torsion [48], rotation [49], gas concentration [29,50], gas pressure [51,52], relative humidity [32,53], and ultrasound [54]. In many of these works, the sensitivity reported by prior works was improved, and simultaneous detection of multiple parameters was also demonstrated.…”

Section: Introductionmentioning

confidence: 99%

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Fiber Laser Sensor Configurations for Refractive Index, Temperature and Strain: A Review

et al. 2023

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Fiber laser sensors have been present for almost four decades as versatile sensing devices with a simple demodulation process, high sensitivity, and competitive resolution. This work discusses the most representative fiber laser sensor configurations employed for detecting critical parameters such as temperature, refractive index, and strain. However, essential information about other interesting parameters that have been measured is considered in this manuscript. Concurrently, the sensing elements and principle operation are described. Furthermore, these configurations are analyzed in terms of their principle of operation, sensitivity, gain medium, and wavelength operation range. According to the literature reviewed, fiber laser sensors offer the possibility of new interrogation techniques and simultaneous, independent detection. Considering interferometric fiber sensors, the fiber laser sensors offer high brightness, good output power, and high resolution. As a result, it is demonstrated that fiber laser sensors are a robust alternative for multiple sensing applications.

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Section: Refractive Index Fiber Laser Sensorsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fiber Laser Sensor Configurations for Refractive Index, Temperature and Strain: A Review

et al. 2023

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“…Inspired by the RI sensor that is presented by Yao et al [ 31 ] and determined to perfect their research, Xing et al [ 32 ] inserted a segment of cladding-less fiber into two sections of SMF with on core-offset joint in order to enhance the extinction ratio of their RI sensor in 2016. With the help of the all-FRL sensing system, the sensor achieved a RI sensitivity of 52.3 nm/RIU in the RI range of 1.334–1.370 as well as a 3-dB bandwidth below 0.2 nm and an optical signal-to-noise ratio near 30 dB.…”

Section: Sensing Applicationsmentioning

confidence: 99%

Optical Fiber Sensors Based on Fiber Ring Laser Demodulation Technology

Xie

Zhang

Wang

et al. 2018

Sensors

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A review for optical fiber sensors based on fiber ring laser (FRL) demodulation technology is presented. The review focuses on the principles, main structures, and the sensing performances of different kinds of optical fiber sensors based on FRLs. First of all, the theory background of the sensors has been discussed. Secondly, four different types of sensors are described and compared, which includes Mach–Zehnder interferometer (MZI) typed sensors, Fabry–Perot interferometer (FPI) typed sensors, Sagnac typed sensors, and fiber Bragg grating (FBG) typed sensors. Typical studies and main properties of each type of sensors are presented. Thirdly, a comparison of different types of sensors are made. Finally, the existing problems and future research directions are pointed out and analyzed.

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“…The high OSNR in FRLs enables remote detection of a particular target measurement at long distance and improves the detection accuracy. Due to high OSNR, low spectral width and high intensity FRLs are of great research interest [20][21][22][23][24][25][26][27][28][29][30]. Different structures had been proposed within FRL setups for sensing applications, i.e.…”

mentioning

confidence: 99%

“…interferometers, i.e. Mach-Zehnder [20,21], Fabry-Pérot [22,23], Sagnac [24,25], and FBGs [26,27]. Shi et al presented a FRL sensor combined with a Fabry-Pérot interferometer (FPI) [28], where an Agarose film was deposited on the fiber to obtain sensitivity to humidity, yielding a sensitivity of 0.202 dB/%RH.…”

mentioning

confidence: 99%

Simultaneous Measurement of Temperature and Relative Humidity Using a Dual-Wavelength Erbium-Doped Fiber Ring Laser Sensor

et al. 2019

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A fiber ring laser sensor setup utilizing FBGs (Fiber Bragg Gratings) for simultaneous measurement of ambient temperature and relative humidity (RH) is presented. Two FBGs are incorporated as tunable filters for a dual-wavelength laser emission, where one FBG was coated with Polyimide (PI) in order to achieve sensitivity to RH changes, while the other bare FBG was used for temperature sensing. An increase in RH would induce a strain on the grating, which results in a variation in the resonance wavelength of the PI-coated FBG. This causes a shift in the laser emission wavelength. Being insensitive to RH changes, the bare FBG was employed to measure temperature. The dual-wavelength fiber ring laser sensor created thus allows to determine simultaneous measurement of RH and temperature. The RH sensitivities observed by the PI coated FBG to RH and temperature are 3.6 pm/%RH and 12.15 pm/°C respectively. The temperature sensitivity of the bare FBG was observed to be 9.6 pm/°C. The main advantage of the proposed setup is an optical signal to noise ratio (OSNR) higher than 55 dB and a 3 dBbandwidth less than 0.02 nm, which points out efficient capabilities for both precise sensing and remote detection applications.

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RI Ring Laser Sensor Based on Concatenating CLF and SMF With One Core-Offset Joint

Cited by 10 publications

References 15 publications

Fiber Laser Sensor Configurations for Refractive Index, Temperature and Strain: A Review

Fiber Laser Sensor Configurations for Refractive Index, Temperature and Strain: A Review

Optical Fiber Sensors Based on Fiber Ring Laser Demodulation Technology

Simultaneous Measurement of Temperature and Relative Humidity Using a Dual-Wavelength Erbium-Doped Fiber Ring Laser Sensor

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