Millimeter-Sized Microfiber Coil Resonators With Enhanced Quality Factors by Increasing Coil Numbers

Hsieh, Yi-Chang; Peng, Tz-Shiuan; Wang, L. A.

doi:10.1109/lpt.2012.2183673

Cited by 15 publications

(5 citation statements)

References 13 publications

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“…Later, similar structure was made by coating the coil resonator with Teflon and wrapping around a PMMA rod which was then resolved in acetone, leaving a microchannel that could be filled by analyte [171]. In order to enhance the quality factor of the coil resonator, the coil number was increased in [172]. A high Q factor of 470,000 was achieved.…”

Section: Microfiber Coilsmentioning

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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Section: Microfiber Coilsmentioning

confidence: 99%

Recent Developments in Micro-Structured Fiber Optic Sensors

Chen

et al. 2017

Fibers

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“…MCRs were first experimentally demonstrated in 2007 [44], and subsequently implemented in various applications [45][46][47][48][49][50][51]. The highest Qfactor experimentally achieved in an MCR, at Q ~ 470,000 [52], is still a few orders of magnitude smaller that the theoretical maximum. Fabrication involves coiling a MNF around a support rod of mm/cm scale diameter using a linear stage that controls the pitch between the turns of the coil and a rotation stage to adjust the rotation angle of the MNF.…”

Section: Microfiber and Nanofiber Sensorsmentioning

confidence: 99%

A Review of Microfiber and Nanofiber Based Optical Sensors

Chen¹

2013

TOOPTSJ

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Rapid advances in optical microfiber and nanofibers (MNF) based sensors have been driven by powerful industries such as automotive, biomedical and defense, with the increasing demand for highly-sensitive, selective, nonintrusive, fast-response, compact and robust sensors that can perform in-situ measurements at remote and harsh environments. A diverse range of MNF based sensors have been developed for measuring refractive index, biochemical , temperature, current, displacement, bend, surface, acceleration, force, rotation, acoustic, electric field and magnetic field. Given the growing interest for this exciting area of scientific research, new designs are emerging continuously at a fast pace. This paper attempts to provide a comprehensive review of all MNF based sensors reported to-date. Sensors are divided according to their morphology and measurand.

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“…One simple structure with twisting a 1μm-microfiber to shape a 1mm diameter loop with quality factor of 630000 has been demonstrated [4]. Theoretically QF value of up to 1010 is predicated [5] and a value of 470000 has been realized by the formation of microfiber coil [6]. Among the proposed structures, microfiber knot has been widely used in applications such as modulators and convertors [7], [8], tunable lasers [9], [10] and sensors [11] due to stable light coupling [12], its firm structure and easy manipulation compare with the others.…”

Section: Introductionmentioning

confidence: 99%

Demonstration of a Periodic Passband Filter Based on Coupled Microfiber Knots

Nodehi

Mohammed

Ahmad

et al. 2016

IEEE Photon. Technol. Lett.

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In this letter, a periodical passband filter based microfiber structure is proposed. The structure is made of successive microfiber knot resonators. The periodical spectral filtering is a result of superposition of the uncoupled modes that belong to the individual microfiber knots and coupling induced resonant wavelength shift. This letter demonstrates the experimental investigation of the thermal effect on the spectral modulation of the structure. The proposed resonator consists of two knots with radii 460.01 and 230 µm, which are knitted successively, in a column. This results in a periodic spectrum with 720-pm passband, 425-pm stopband, and a suppression ratio of 5.2 dB. Increasing the optical path, using a hot metal bar with a temperature of 30°close to the big knot, the periodic passband filter switches to all pass filter with a free spectral range of 1150 pm and quality factor 6000. This letter as well demonstrates experimentally how to enhance passband and stopband widths through decreasing the knot's radii as well as increasing the number of knots. Compatibility of this structure with single-mode fiber systems makes it easy to be used as noise filtering in telecommunication and fiber lasers.Index Terms-Microfiber knot, pass band filter, fiber laser.

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Millimeter-Sized Microfiber Coil Resonators With Enhanced Quality Factors by Increasing Coil Numbers

Cited by 15 publications

References 13 publications

Recent Developments in Micro-Structured Fiber Optic Sensors

Recent Developments in Micro-Structured Fiber Optic Sensors

A Review of Microfiber and Nanofiber Based Optical Sensors

Demonstration of a Periodic Passband Filter Based on Coupled Microfiber Knots

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