Spun elliptically birefringent photonic crystal fibre for current sensing

Michie, Andrew; Canning, John; Bassett, I.M.; Haywood, John; Digweed, Katja; Ashton, Brian; Stevenson, Michael; Digweed, Justin; Lau, Alfred; Scandurra, D.

doi:10.1088/0957-0233/18/10/s04

Cited by 13 publications

(8 citation statements)

References 13 publications

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“…it is linearly birefringent, then it will support elliptically polarized eigenmodes when spun into a chiral structure. Such modes have been used in current and magnetic field sensing based on the Faraday effect [9,10]. …”

Section: Introductionmentioning

confidence: 99%

Helically twisted photonic crystal fibres

Russell¹,

Beravat²,

Wong³

2017

Phil. Trans. R. Soc. A.

117

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Recent theoretical and experimental work on helically twisted photonic crystal fibres (PCFs) is reviewed. Helical Bloch theory is introduced, including a new formalism based on the tight-binding approximation. It is used to explore and explain a variety of unusual effects that appear in a range of different twisted PCFs, including fibres with a single core and fibres with N cores arranged in a ring around the fibre axis. We discuss a new kind of birefringence that causes the propagation constants of left- and right-spinning optical vortices to be non-degenerate for the same order of orbital angular momentum (OAM). Topological effects, arising from the twisted periodic ‘space’, cause light to spiral around the fibre axis, with fascinating consequences, including the appearance of dips in the transmission spectrum and low loss guidance in coreless PCF. Discussing twisted fibres with a single off-axis core, we report that optical activity in a PCF is opposite in sign to that seen in a step-index fibre. Fabrication techniques are briefly described and emerging applications reviewed. The analytical results of helical Bloch theory are verified by an extensive series of ‘numerical experiments’ based on finite-element solutions of Maxwell's equations in a helicoidal frame.This article is part of the themed issue ‘Optical orbital angular momentum’.

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Section: Introductionmentioning

confidence: 99%

Helically twisted photonic crystal fibres

Russell¹,

Beravat²,

Wong³

2017

Phil. Trans. R. Soc. A.

117

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“…The growth of magnetic field PCF-based sensors is at slow pace. The development of a spun elliptically birefringent PCF with reduced temperature dependence [57] showed the advantages of this PCF over conventional spun stress birefringence fibers, opening the possibility for magnetic sensing with PCFs. The development of a magnetooptic Faraday effect in a miniature coil wound from a sixhole spun PCF [58] provided information about the ability of this PCF to efficiently accumulate Faraday phase shift in a magnetic field even when the fiber is wound into a coil of very small diameter.…”

Section: Electric and Magnetic Field Sensorsmentioning

confidence: 99%

Photonic Crystal Fibers for Sensing Applications

2012

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Photonic crystal fibers are a kind of fiber optics that present a diversity of new and improved features beyond what conventional optical fibers can offer. Due to their unique geometric structure, photonic crystal fibers present special properties and capabilities that lead to an outstanding potential for sensing applications. A review of photonic crystal fiber sensors is presented. Two different groups of sensors are detailed separately: physical and biochemical sensors, based on the sensor measured parameter. Several sensors have been reported until the date, and more are expected to be developed due to the remarkable characteristics such fibers can offer.

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“…In order to eliminate this unwanted effect one can apply optical fibers of very high [8][9][10] or very low birefringence [1,11]. This paper is focused on possibility of application of indexguiding photonic crystal fibers (IGPCF) [12]. These fibers are characterized by following features [13]:…”

Section: Introductionmentioning

confidence: 99%

Magnetooptic effect of photonic crystal fiber in blue region of visible spectrum

Barczak¹

2014

Bulletin of the Polish Academy of Sciences Technical Sciences

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Abstract. The phenomenon of optical birefringence in optical fibers is caused by external factors and stress induced by the manufacturing process. This optical birefringence makes it difficult to apply optical fibers as a polarimetric sensors head. Author of this paper, proposes the application of index guiding photonic crystal fibers because stress values in a fiber core caused by internal and external factors are lower. In this paper investigation results extended in comparison with the previous author's investigations are presented. This extension relies on investigation of magnetooptic for wavelength 405 nm. On the basis of experimental results optimal work points of optical sensing fibers were determined.

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Spun elliptically birefringent photonic crystal fibre for current sensing

Cited by 13 publications

References 13 publications

Helically twisted photonic crystal fibres

Helically twisted photonic crystal fibres

Photonic Crystal Fibers for Sensing Applications

Magnetooptic effect of photonic crystal fiber in blue region of visible spectrum

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