Curvature sensor based on two cascading abrupt-tapers modal interferometer in single mode fiber

Niu, Luo; Chen, Zhao; Gong, Huaping; Yi, Li; Jin, Shangzhong

doi:10.1016/j.optcom.2014.07.036

Cited by 63 publications

(17 citation statements)

References 15 publications

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“…This is a great advantage, especially compared to those approaches that require complex glass-processing machines to fabricate sensing structures. Similar structures, with a sensing fiber spliced between two single-mode fibers, have been used in previous works [1,7,8,[12][13][14][15][16][17] showing that this approach is indeed suitable for various sensing applications, while exhibiting simplicity and easy manufacturing. The fabrication of the device only requires the use of a standard fusion splicing machine.…”

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confidence: 91%

Compact fiber-optic curvature sensor based on super-mode interference in a seven-core fiber

et al. 2015

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A compact, low loss, and highly sensitive optical fiber curvature sensor is presented. The device consists of a few-millimeter-long piece of seven-core fiber spliced between two single-mode fibers. When the optical fiber device is kept straight, a pronounced interference pattern appears in the transmission spectrum. However, when the device is bent, a spectral shift of the interference pattern is produced, and the visibility of the interference notches changes. This allows for using either visibility or spectral shift for sensor interrogation. The dynamic range of the device can be tailored through the proper selection of the length of the seven-core fiber. The effects of temperature and refractive index of the external medium on the response of the curvature sensor are also discussed. Linear sensitivity of about 3000 nm/mm(-1) for bending was observed experimentally.

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confidence: 91%

Compact fiber-optic curvature sensor based on super-mode interference in a seven-core fiber

et al. 2015

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“…Recently, several new fabrication methods for short abrupt tapers have been proposed and demonstrated in experiments. For example, a high-frequency pulsed CO2 laser with a maximum average output power of 10 W was employed to modify the fiber structure by applying a constant tension to the ends of the fiber [28]; in [29], a compact abrupt taper MI was manufactured by fusion splicing the fiber taper with two normal cleaved fiber ends; a more straightforward method was proposed in [30], where the abrupt taper was made by directly fusion splicing two normal cleaved fiber ends. These methods provide more access to the abrupt taper manufacturing and bring multiple configurations to the abrupt taper structure.…”

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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“…A segment of SMF could transmit the fundamental mode in the core, but it can be seen as a section of multimode fiber (MMF) taking into account of the cladding modes. In spite of the good experimental results achieved by means of the multimode modal interference [5][6][7], it is necessary to find the possibility to improve the bending sensitivity for the engineering applications.…”

Section: Introductionmentioning

confidence: 99%

“…Based on two cascading abrupt-tapers modal interferometer in a single mode fiber, a high curvature sensitivity of À 13.176 nm/m À 1 was achieved within the in the measurement ranges of 4.8-6.38 m À 1 . Unfortunately, the manufacturing process needs the CO 2 laser which is expensive for general economic conditions [6]. To date, the optical fiber sensors based on multimode interference (MMI) are paid close attention and many kinds of MMI sensor configurations have been proposed, such as core mismatch structure [4,5], s-tapered fiber [7], waist-enlarged tapers [8,9], peanut-shape structure [10], core-offset splicing [4] or the combination of these structures.…”

Section: Introductionmentioning

confidence: 99%

Highly sensitive bending sensor based on multimode–multimode–coreoffset fiber structure

Sun

et al. 2015

Optics & Laser Technology

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Curvature sensor based on two cascading abrupt-tapers modal interferometer in single mode fiber

Cited by 63 publications

References 15 publications

Compact fiber-optic curvature sensor based on super-mode interference in a seven-core fiber

Compact fiber-optic curvature sensor based on super-mode interference in a seven-core fiber

Recent Developments in Micro-Structured Fiber Optic Sensors

Highly sensitive bending sensor based on multimode–multimode–coreoffset fiber structure

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