Fiber Ring Cavity Laser Based on Modal Interference for Curvature Sensing

Sun, Chunran; Wang, Muguang; Liu, Jingxuan; Ye, Shen; Liang, Linjun; Jian, Shuisheng

doi:10.1109/lpt.2016.2517666

Cited by 23 publications

(11 citation statements)

References 16 publications

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“…The comparison is listed in Table 1 . As it can be observed, when the sensor is inserted into a laser cavity, the Q value is highly increased due to the high visibility and the reduced FWHM [ 7 , 17 ]. Compared with the in-fiber sensors designed by core-offset splicing and no-core fiber structures, the proposed sensor exhibits lower sensitivity to curvature which is typical of DCF-based in-fiber sensor [ 18 ].…”

Section: Discussionmentioning

confidence: 99%

“…With a design improvement of the laser cavity in terms of the linewidth narrowing, the Q value can be increased as it can be observed from the Table 1 for the results shown in ref. [ 7 ].…”

Section: Discussionmentioning

confidence: 99%

“…Specially, they have been attracted wide attention in fiber sensing because their many advantages such as high sensitivity, immunity to electromagnetic field, small size, low-cost, low maintenance required, and long term operation. Different approaches of fiber sensors designed with in-fiber structures used as wavelength filter as well as sensing element has been reported to measure refractive index (RI) [ 1 , 2 , 3 ], curvature [ 4 , 5 , 6 , 7 ], temperature [ 8 ], displacement/strain [ 9 , 10 ], and simultaneous or different physical parameters with the same configuration [ 11 , 12 , 13 , 14 ]. In particular, in-fiber curvature sensors have been of increasing interest for applications such as monitoring of smart and composite engineering structures, robotics, prosthetics design, medical treatment, and industrial metrology, among others.…”

Section: Introductionmentioning

confidence: 99%

“…An in-fiber structure based on modal interference used as sensing device requires a fiber element to recombine the excited coupled modes from cladding with the core modes producing an interference effect leading to a modulated transmission of the input signal. The produced interference effect can be caused by tapered fibers [ 5 , 11 , 15 ], core-offset splices and core diameter mismatch [ 4 , 8 , 13 , 16 ], multimode interference (MMI) [ 2 , 6 , 7 , 10 ], and multipath by micro-structured fibers [ 9 , 14 , 17 ], among others. All of the proposed techniques exhibit their own disadvantages.…”

Section: Introductionmentioning

confidence: 99%

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All-Fiber Laser Curvature Sensor Using an In-Fiber Modal Interferometer Based on a Double Clad Fiber and a Multimode Fiber Structure

Álvarez-Tamayo

Durán-Sánchez

Prieto-Cortés

et al. 2017

Sensors

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An all-fiber curvature laser sensor by using a novel modal interference in-fiber structure is proposed and experimentally demonstrated. The in-fiber device, fabricated by fusion splicing of multimode fiber and double-clad fiber segments, is used as wavelength filter as well as the sensing element. By including a multimode fiber in an ordinary modal interference structure based on a double-clad fiber, the fringe visibility of the filter transmission spectrum is significantly increased. By using the modal interferometer as a curvature sensitive wavelength filter within a ring cavity erbium-doped fiber laser, the spectral quality factor Q is considerably increased. The results demonstrate the reliability of the proposed curvature laser sensor with advantages of robustness, ease of fabrication, low cost, repeatability on the fabrication process and simple operation.

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Section: Discussionmentioning

confidence: 99%

“…With a design improvement of the laser cavity in terms of the linewidth narrowing, the Q value can be increased as it can be observed from the Table 1 for the results shown in ref. [ 7 ].…”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

All-Fiber Laser Curvature Sensor Using an In-Fiber Modal Interferometer Based on a Double Clad Fiber and a Multimode Fiber Structure

Álvarez-Tamayo

Durán-Sánchez

Prieto-Cortés

et al. 2017

Sensors

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“…Also, seeing the potential that FRL can bring in remote sensing, Sun et al [ 50 ] proposed a FRL curvature sensor based on a SNCS structure which is simply fabricated by a fiber fusion splicer in 2016. The SNCS structure was used as the sensing element and the bandpass filter, and made the sensor gain a sensitivity of curvature of about −22.33 nm/m −1 in the range of 0.2121–0.3463 m −1 .…”

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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