Generation of infrared supercontinuum radiation: spatial mode dispersion and higher-order mode propagation in ZBLAN step-index fibers

Jacob Søndergaard Ramsay; Sune Vestergaard Lund Dupont; Mikkel Willum Johansen; Lars Søgaard Rishøj; Karsten Rottwitt; Peter M. Moselund; Søren Rud Keiding

doi:10.1364/OE.21.010764

Generation of infrared supercontinuum radiation: spatial mode dispersion and higher-order mode propagation in ZBLAN step-index fibers

Jacob Søndergaard Ramsay, Sune Vestergaard Lund Dupont, Mikkel Willum Johansen, Lars Søgaard Rishøj, Karsten Rottwitt, Peter M. Moselund, Søren Rud Keiding

Aarhus University

Research output: Contribution to journal › Journal article › Research › peer-review

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Abstract

Using femtosecond upconversion we investigate the time and wavelength structure of infrared supercontinuum generation. It is shown that radiation is scattered into higher order spatial modes (HOMs) when generating a supercontinuum using fibers that are not single-moded, such as a step-index ZBLAN fiber. As a consequence of intermodal scattering and the difference in group velocity for the modes, the supercontinuum splits up spatially and temporally. Experimental results indicate that a significant part of the radiation propagates in HOMs. Conventional simulations of super-continuum generation do not include scattering into HOMs, and including this provides an extra degree of freedom for tailoring supercontinuum sources.

Original language	English
Journal	Optics Express
Volume	21
Issue number	9
Pages (from-to)	10764-10771
ISSN	1094-4087
DOIs	https://doi.org/10.1364/OE.21.010764
Publication status	Published - 2013

Bibliographical note

This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/oe/abstract.cfm?uri=oe-21-9-10764. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.

Keywords

Fiber characterization
Nonlinear optics, fibers
Upconversion
Supercontinuum generation

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10.1364/OE.21.010764

Oe 21 9 10764Final published version, 797 KB

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title = "Generation of infrared supercontinuum radiation: spatial mode dispersion and higher-order mode propagation in ZBLAN step-index fibers",

abstract = "Using femtosecond upconversion we investigate the time and wavelength structure of infrared supercontinuum generation. It is shown that radiation is scattered into higher order spatial modes (HOMs) when generating a supercontinuum using fibers that are not single-moded, such as a step-index ZBLAN fiber. As a consequence of intermodal scattering and the difference in group velocity for the modes, the supercontinuum splits up spatially and temporally. Experimental results indicate that a significant part of the radiation propagates in HOMs. Conventional simulations of super-continuum generation do not include scattering into HOMs, and including this provides an extra degree of freedom for tailoring supercontinuum sources.",

keywords = "Fiber characterization, Nonlinear optics, fibers, Upconversion, Supercontinuum generation",

author = "Ramsay, {Jacob S{\o}ndergaard} and Dupont, {Sune Vestergaard Lund} and Johansen, {Mikkel Willum} and Rish{\o}j, {Lars S{\o}gaard} and Karsten Rottwitt and Moselund, {Peter M.} and Keiding, {S{\o}ren Rud}",

note = "This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/oe/abstract.cfm?uri=oe-21-9-10764. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.",

year = "2013",

doi = "10.1364/OE.21.010764",

language = "English",

volume = "21",

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Generation of infrared supercontinuum radiation: spatial mode dispersion and higher-order mode propagation in ZBLAN step-index fibers. / Ramsay, Jacob Søndergaard; Dupont, Sune Vestergaard Lund; Johansen, Mikkel Willum et al.
In: Optics Express, Vol. 21, No. 9, 2013, p. 10764-10771.

Research output: Contribution to journal › Journal article › Research › peer-review

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AU - Ramsay, Jacob Søndergaard

AU - Dupont, Sune Vestergaard Lund

AU - Johansen, Mikkel Willum

AU - Rishøj, Lars Søgaard

AU - Rottwitt, Karsten

AU - Moselund, Peter M.

AU - Keiding, Søren Rud

N1 - This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/oe/abstract.cfm?uri=oe-21-9-10764. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.

PY - 2013

Y1 - 2013

N2 - Using femtosecond upconversion we investigate the time and wavelength structure of infrared supercontinuum generation. It is shown that radiation is scattered into higher order spatial modes (HOMs) when generating a supercontinuum using fibers that are not single-moded, such as a step-index ZBLAN fiber. As a consequence of intermodal scattering and the difference in group velocity for the modes, the supercontinuum splits up spatially and temporally. Experimental results indicate that a significant part of the radiation propagates in HOMs. Conventional simulations of super-continuum generation do not include scattering into HOMs, and including this provides an extra degree of freedom for tailoring supercontinuum sources.

AB - Using femtosecond upconversion we investigate the time and wavelength structure of infrared supercontinuum generation. It is shown that radiation is scattered into higher order spatial modes (HOMs) when generating a supercontinuum using fibers that are not single-moded, such as a step-index ZBLAN fiber. As a consequence of intermodal scattering and the difference in group velocity for the modes, the supercontinuum splits up spatially and temporally. Experimental results indicate that a significant part of the radiation propagates in HOMs. Conventional simulations of super-continuum generation do not include scattering into HOMs, and including this provides an extra degree of freedom for tailoring supercontinuum sources.

KW - Fiber characterization

KW - Nonlinear optics, fibers

KW - Upconversion

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ER -

Generation of infrared supercontinuum radiation: spatial mode dispersion and higher-order mode propagation in ZBLAN step-index fibers

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