Comparative study of the effective single mode operational bandwidth in sub-wavelength optical wires and conventional single-mode fibers

Jung, Yongmin; Brambilla, Gilberto; Richardson, David J.

doi:10.1364/oe.17.016619

Cited by 14 publications

(11 citation statements)

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“…Research in tunable filters has been mainly focused on the realization of frequency tuning [1,2]. Zhou et al [1] have presented a varactor tunable filter based on k=2 resonators and tapped k=4 stubs with center frequency and transmission zeros control.…”

Section: Received 3 August 2015mentioning

confidence: 99%

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Effects of taper parameters on free spectral range of non‐adiabatic tapered optical fibers for sensing applications

Musa

Kamil

Bakar

et al. 2016

Micro & Optical Tech Letters

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We investigated the effects of taper parameters on the free spectral range of transmission spectrum of non-adiabatic tapers. From experimental results, the optimum profile for the tapered fiber in terms of taper angle, waist diameter, and length are 11.500 mrad, 10 lm, and 20 mm, respectively. V C 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:798-803, 2016; View this article online at wileyonlinelibrary.com.

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Section: Received 3 August 2015mentioning

confidence: 99%

“…mode filtering [2], microscopic particle trapping [3], microscale/nanoscale photonic devices [4], and evanescent coupling to planar waveguide or microresonators [5]. Tapering a single mode fiber (SMF) is normally achieved by using a conventional heat-and-pull method where a heat source is used to soften the fiber.…”

mentioning

confidence: 99%

Effects of taper parameters on free spectral range of non‐adiabatic tapered optical fibers for sensing applications

Musa

Kamil

Bakar

et al. 2016

Micro & Optical Tech Letters

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“…In the transition region the higher order mode (LP 11 ) exchange power with even higher order modes that can be leaked out if not supported by the OM in the uniform waist region. This effect has been exploited to eliminate high order modes from few mode fibres and couplers [45][46][47], selective excitation of fundamental mode in few mode fibres [48], interferometric sensors in taper tips [49], and comb-like filters for tunable lasers [50]. In the minimum waist region the mode propagating in the OM is effectively guided by the cladding/air interface and it is not affected by the relative core size in its pigtails.…”

Section: Fig2mentioning

confidence: 99%

[INVITED] Optical microfibre devices

Brambilla

2016

Optics & Laser Technology

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In the last decade optical fibre tapers with micrometer diameter (often called microfibers) have been investigated for numerous applications ranging from sensing to wavelength convertors, telecom and optical manipulation. This paper reviews the various applications of microfibres. 1. Optical microfibres Although microfibers with diameters comparable to the wavelength have been manufactured for nearly half of a century [1], their application in devices has been limited because of the perceived difficulty to achieve low-loss propagation [2]. Microfibres have been manufactured from a variety of different materials including silica [3-8], silicon [9,10], phosphate [11], tellurite [11], lead-silicate [12], bismuthate [12] and chalcogenide glasses [13] and a variety of polymers [14-19]. Most of the microfibers exhibited an irregular profile along their length which resulted in high propagation losses in devices. In the last decade the use of the flame-brushing technique [3-8] allowed to manufacture microfibers with losses smaller than 0.01dB/mm, sufficiently low for the manufacture of devices for sensing, comms, wavelength conversion and optical manipulation. Optical microfibers (OMs) are optical fibre tapers with diameters comparable to the wavelength of light propagating in them. They generally fabricated by tapering optical fibres and therefore result connected to conventional optical fibres by transition regions (Fig. 1). If the transition region has a suitably small angle, a single mode launched in the optical fibre pigtail core is adiabatically transferred in a single mode guided by the cladding/external medium interface and no power occurs into other modes.

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“…In this way, when a suitable transition‐region profile is used in conjunction with a small uniform waist region, OMs can filter out higher‐order modes at most wavelengths and provide extremely broadband single‐mode guidance to conventional optical fibers. A tapered conventional telecom optical fiber was shown to maintain single‐mode guidance from 400 nm to 1700 nm . Single‐mode guidance at the cladding/air interface has also been exploited to selectively launch the fundamental mode in a fiber supporting few modes .…”

Section: Devices Based On Large Evanescent Fieldmentioning

confidence: 99%