Optimization of cascaded fiber tapered Mach–Zehnder interferometer and refractive index sensing technology

Wang, Qi; Wei, Wenqing; Guo, Mengjuan; Zhao, Yong

doi:10.1016/j.snb.2015.07.098

Cited by 75 publications

(21 citation statements)

References 24 publications

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“…The use of fusion splicing, etching, or flame exposure while the fiber is stretched are some of the techniques to prepare tapers. Although some configurations are based on two cascaded tapers, some simple refractometers with just one taper can reach an RI sensitivity up to 1656 nm per RIU . Other configurations based on bent fibers or transitions with core‐mismatch or lateral offsets have also been reported in the last few years, broadening the variety of MZI structures for RI sensing.…”

Section: Refractometers Based On Optical Interferometersmentioning

confidence: 99%

A Comprehensive Review of Optical Fiber Refractometers: Toward a Standard Comparative Criterion

Urrutia

Villar

Zubiate

et al. 2019

Laser & Photonics Reviews

138

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Thanks to the peculiarities of optical fiber and its ability to be combined with nanotechnology, precise and accurate measurements of the changes in optical properties (i.e., refractive index) of the medium surrounding the fiber are becoming possible with a high degree of performance. Thus, optical fiber sensors (OFSs) are increasingly finding applications in biochemistry and biomedicine. Here, all types of optical fiber refractometers are covered, and they are classified into three main groups: interferometers, grating‐based structures, and resonance‐based structures (the resonance is induced by coating the optical fiber sensor with a thin film). The performance of these different structures is compared by means of the most common parameters: sensitivity, full width at half minimum or maximum, figure of merit, and quality factor. The aim here is to provide a reliable and easy‐to‐use tool to compare the performance of the most recent developments on fiber optic refractometers.

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Section: Refractometers Based On Optical Interferometersmentioning

confidence: 99%

A Comprehensive Review of Optical Fiber Refractometers: Toward a Standard Comparative Criterion

Urrutia

Villar

Zubiate

et al. 2019

Laser & Photonics Reviews

138

View full text Add to dashboard Cite

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“…The fringe visibility of the MZI with 35 mm PCF, 40 mm PCF and 45 mm PCF were as high as 19.56 dB, 17.78 dB and 23.03 dB, respectively. Those were larger than that of two-taper MZI (17.5 dB) [ 33 ], taper-core-offset section MZI (11.3 dB) [ 34 ], step-like taper MZI (18.64 dB) [ 35 ], normal PCF-MZI (14 dB) [ 23 ]. In addition, the free spectrum range (FSR) would be reduced as the length of MZI increased.…”

Section: Resultsmentioning

confidence: 99%

Highly Sensitive Strain Sensor Based on a Novel Mach-Zehnder Interferometer with TCF-PCF Structure

Dong

Luo

et al. 2018

Sensors

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A highly sensitive strain sensor based on a novel fiber in line Mach-Zehnder interferometer (MZI) was demonstrated experimentally. The MZI was realized by splicing a section of photonic crystal fiber (PCF) with the same length of thin core fiber (TCF) between two single mode fibers (SMFs). The fringe visibility of MZI can reach as high as 20 dB in air. In particular, the strain sensitivity of −1.95 pm/με was achieved within a range from 0 to 4000 με. Furthermore, the strain properties of different length of MZI was investigated. It was found that the sensitivity was weekly dependent on the length of MZI. The strain sensitivities corresponding to the MZI with 35 mm PCF, 40 mm PCF and 45 mm PCF at 1550 nm band were −1.78 pm/με, −1.73 pm/με and −1.63 pm/με, respectively. Additionally, the sensor has advantages of simple fabrication, compact size and high sensitivity as well as good fringe visibility.

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“…Single parameter measurement was pioneered in [31,32], where the RI and strain were quantified. The following works also achieved curvature [33], lateral stress [34], liquid level [35], and enhanced sensitivity for RI [36] measurements. The aforementioned measurements all employed the widely used peak wavelength shift method, which could be not practical when there is only small difference between the two spectra.…”

Section: Short Tapermentioning

confidence: 99%

Recent Developments in Micro-Structured Fiber Optic Sensors

Chen

et al. 2017

Fibers

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Recent developments in fiber-optic sensing have involved booming research in the design and manufacturing of novel micro-structured optical fiber devices. From the conventional tapered fiber architectures to the novel micro-machined devices by advanced laser systems, thousands of micro-structured fiber-optic sensors have been proposed and fabricated for applications in measuring temperature, strain, refractive index (RI), electric current, displacement, bending, acceleration, force, rotation, acoustic, and magnetic field. The renowned and unparalleled merits of sensors-based micro-machined optical fibers including small footprint, light weight, immunity to electromagnetic interferences, durability to harsh environment, capability of remote control, and flexibility of directly embedding into the structured system have placed them in highly demand for practical use in diverse industries. With the rapid advancement in micro-technology, micro-structured fiber sensors have benefitted from the trends of possessing high performance, versatilities and spatial miniaturization. Here, we comprehensively review the recent progress in the micro-structured fiber-optic sensors with a variety of architectures regarding their fabrications, waveguide properties and sensing applications.

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Optimization of cascaded fiber tapered Mach–Zehnder interferometer and refractive index sensing technology

Cited by 75 publications

References 24 publications

A Comprehensive Review of Optical Fiber Refractometers: Toward a Standard Comparative Criterion

A Comprehensive Review of Optical Fiber Refractometers: Toward a Standard Comparative Criterion

Highly Sensitive Strain Sensor Based on a Novel Mach-Zehnder Interferometer with TCF-PCF Structure

Recent Developments in Micro-Structured Fiber Optic Sensors

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