Interrogation of microresonators using multimode fibers

Caldas, Paulo; Jorge, P. A. S.; Araújo, F. M.; Ferreira, L. A.; Rego, G.; Santos, J. L.; Berneschi, S.; Cosi, Franco; Soria, Silvia; Pelli, S.; Conti, G. Nunzi

doi:10.1117/12.866355

Cited by 4 publications

(3 citation statements)

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“…The length of the taper region can be controlled by displacing the fibre during the arc discharge [10]. Tapers increase the interaction between the fibre guided modes and the surrounding medium, thus being very useful for refractive index measurement, particularly when combined with fibre gratings [32]. A severe taper can be used for laser beam shaping [33,34].…”

Section: Basic Devices: Fibre Tapers Probes and Microspheresmentioning

confidence: 99%

“…Figure 9(b) shows the transmission spectrum of two LPFGs arc-induced in the B/Ge co-doped fibre (5.1 g, 9 mA, 0.5 s, 425 μm, 60 discharges), each having a transmission loss of 3 dB at 1.55 μm. If a taper is fabricated in the region between the gratings an interferometer highly sensitive to variations of the external refractive index is achieved [82,32]. Recently, another interesting interferometer comprising a LPFG and an arc-induced point defect in a photonic crystal fibre was proposed by Choi et al [83].…”

Section: Long-period Grating Based Devicesmentioning

confidence: 99%

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Fibre optic devices produced by arc discharges

Rego

2010

J. Opt.

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We present an overview of the applications of the electric arc technique related to optical fibre technology. The use of arc discharges ranges from the well-known fibre splicing, going through the fabrication of basic devices such as fibre tapers and microspheres, to tailoring the spectra of UV-induced gratings such as in the apodization of fibre Bragg gratings and also in the fabrication of phase-shifted and sampled fibre Bragg gratings. However, in the past decade a topic more intensively investigated was probably long-period fibre gratings. Therefore, some devices based on arc-induced gratings, namely, phase-shifted and step-changed gratings and bandpass filters are discussed. We also present an electrically insulated thermocouple assembled in situ using arc discharges. This sensor is very useful in the determination of the temperature attained by the fibre during an arc discharge, this property being fundamental for the discussion of the mechanisms of formation and for the understanding of the thermal properties of arc-induced devices.

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Section: Basic Devices: Fibre Tapers Probes and Microspheresmentioning

confidence: 99%

Section: Long-period Grating Based Devicesmentioning

confidence: 99%

Fibre optic devices produced by arc discharges

Rego

2010

J. Opt.

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“…There are many applications of in several sensing systems [71][72][73][74] such as sensing vibration signals [75]. Recently a long FBG based Michelson modal interferometer is studied as a sensing structure for measuring environmental refractive index, temperature, and liquid level by Caldas et al [76].…”

Section: Inferometric Fiber Sensormentioning

confidence: 99%

Review on Developments in Fiber Optical Sensors and Applications

Annamdas¹

2012

IJME

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The last couple of decades had witnessed a steep rise in extensive research of optoelectronic and fiber optical communication fields, which resulted in applications focused initially in military, aerospace equipments, and later in health monitoring for medicine, heritage culture and various engineering fields. Health monitoring has attracted the effort of many engineers throughout the world and is fast emerging as a pioneering field. It is helping to improve world economy in two ways; first, directly by providing longevity to all the important structures and secondly, by prevention of untimely failure leading to loss of life and money. This field is very vast, consisting of traditional monitoring methods as well as smart system based methods. The fiber optics belong to finest class of smart materials, there are many types and classifications of fiber optics based on necessity, manufacturer and the end user. This paper, gives a complete over view of fiber sensing systems and their usefulness. In addition, it highlights some of the general fiber optics available in the market with selected examples.

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