Journal ArticleDOI
Mode conversion coefficients in optical fibers.
TLDR
A simple method has been devised for the experimental determination of mode conversion coefficients in multimode fibers and involves only the observation of the far-field output as the angle of incidence of a collimated input beam is changed.Abstract:
A simple method has been devised for the experimental determination of mode conversion coefficients in multimode fibers and involves only the observation of the far-field output as the angle of incidence of a collimated input beam is changed. The normalized mode coupling coefficient in a liquid-core fiber is D = 3 x 10-6 rad2 / m and increases by as much as a factor of 10 when transverse pressure is applied. Values some 2 orders of magnitude larger are found in glass-core fibers. There is good agreement between the theory presented and experiment.read more
Citations
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Journal ArticleDOI
Exploiting multimode waveguides for pure fibre-based imaging
Tomáš Čižmár,Kishan Dholakia +1 more
TL;DR: A novel approach is presented by utilizing disordered light within a standard multimode optical fibre for lensless microscopy and optical mode conversion and showing how such control can realize a new form of mode converter and generate various types of advanced light fields such as propagation-invariant beams and optical vortices.
Journal ArticleDOI
Seeing through chaos in multimode fibres
TL;DR: In this article, the prediction of light propagation up to hundreds of millimetres within straight or even deformed segments of multimode fibres is demonstrated in an endoscope and exceptional resolution and footprint are obtained.
Journal ArticleDOI
Single-mode excitation of multimode fibers with ultrashort pulses.
TL;DR: Single-mode excitation of step-index multimode fibers with light sources with short temporal coherence lengths is demonstrated and designs with reduced microbending-induced mode coupling are described that allow the propagation of the fundamental mode over long lengths with negligible mode coupling even in the presence of tight fiber bends.
Journal ArticleDOI
Mode-scalable fiber-based chirped pulse amplification systems
TL;DR: In this paper, the development of high-power fiber technology, which recently has led to millijoule energies and /spl sim/10 W average powers from various femtosecond fiber systems, is reviewed.
Journal ArticleDOI
Change of the refractive index in an optical fiber due to external forces
TL;DR: This paper investigates experimentally the change of the refractive index, due to forces such as pulling and pure bending, in an optical fiber fabricated by the CVD technique, and finds that this phenomenon can be interpreted in terms of a simple model of the fiber, that is, a mechanically homogeneous circular rod.
References
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Journal ArticleDOI
Optical power flow in multimode fibers
TL;DR: In this article, the authors investigated the relationship between loss, coupling, and delay differences among the modes of multimode fibers and provided a comprehensive description of the interrelations between them.
Journal ArticleDOI
The length dependence of pulse spreading in the CGW-Bell-10 optical fiber
TL;DR: In this paper, the authors showed that pulse broadening in the CGW-Bell-10 optical fiber showed very low dispersion ( 550 m) which is of practical significance.
Journal ArticleDOI
Mode excitation in a multimode optical-fibre waveguide
TL;DR: For normal incidence of a Gaussian beam on a multimode optical fiber, theory predicts that only HE1m, modes are excited as mentioned in this paper, and this is confirmed experimentally for a liquid-core fibre of normalised frequency v = 125.
Journal ArticleDOI
Pulse dispersion for single-mode operation of multimode cladded optical fibres
TL;DR: Pulse dispersions as low as 0.4 ns/km have been measured in multimode cladded fibres at a normalised frequency V = 125 and for a constant bend radius of 5.5 cm.
Journal ArticleDOI
Effect of loss on propagation in multimode fibres
TL;DR: In this paper, an analysis of fiber propagation in multimode optical fibres having finite transmission loss is given, where the core loss has little effect on dispersion and the cladding loss reduces dispersion for a relatively small increase in attenuation.
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