Jesper Lægsgaard

Jesper Lægsgaard

Associate Professor

DTU FOTONIK
Department of Photonics Engineering

Fiber Optics, Devices and Non-linear Effects

Technical University of Denmark

Ørsteds Plads

Building 343, room 128

2800 Kgs. Lyngby

Ph.
Fax +45 45 93 65 81
E-mail jlag@fotonik.dtu.dk

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2017
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Flexible cross-correlated (C2) imaging method for the modal content characterization in a broad range of wavelengths

Muliar, Olena ; Usuga Castaneda, Mario A. ; Michieletto, Mattia ; Kristensen, Torben ; Alkeskjold, Thomas T. ; Rottwitt, Karsten ; Lægsgaard, Jesper
in journal: Optics Express (ISSN: 1094-4087) (DOI: http://dx.doi.org/10.1364/OE.25.005521), vol: 25, issue: 5, pages: 5521-5535, 2017

Type: Journal article (Peer reviewed)

Status: Published     |    Year: 2017     |    DOI: http://dx.doi.org/10.1364/OE.25.005521

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High precision Cross-correlated imaging in Few-mode fibers

Muliar, Olena ; Usuga Castaneda, Mario A. ; Kristensen, Torben ; Alkeskjold, Thomas Tanggaard ; Rottwitt, Karsten ; Lægsgaard, Jesper
part of: Proceedings of SPIE (ISBN: 9781510607019), 2017, SPIE - International Society for Optical Engineering,
Presented at:
Next-Generation Optical Communication: Components, Sub-Systems, and Systems V, 2016, San Francisco, CA

Type: Article in proceedings (Peer reviewed)

Status: Published     |    Year: 2017     |    DOI: http://dx.doi.org/10.1117/12.2250532

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Azimuthal asymmetry in HE1,X modes analyzed

Astorino, Antonio ; Usuga Castaneda, Mario A. ; Israelsen, Stine Møller ; Lægsgaard, Jesper ; Rottwitt, Karsten
part of: Frontiers in Optics 2017 (ISBN: 978-1-943580-33-0), 2017, Optical Society of America OSA,
Presented at:
Frontiers in Optics 2017, 2017, Washington, D.C

Type: Article in proceedings (Peer reviewed)

Status: Published     |    Year: 2017     |    DOI: http://dx.doi.org/10.1364/FIO.2017.JTu3A.87

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Efficient simulation of multimodal nonlinear propagation in step-index fibers

Lægsgaard, Jesper
in journal: Journal of the Optical Society of America B-optical Physics (ISSN: 0740-3224) (DOI: http://dx.doi.org/10.1364/JOSAB.34.002266), vol: 34, issue: 10, pages: 2266-2273, 2017

Type: Journal article (Peer reviewed)

Status: Published     |    Year: 2017     |    DOI: http://dx.doi.org/10.1364/JOSAB.34.002266

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Nonlinearity-tailored fiber laser technology for low-noise, ultra-wideband tunable femtosecond light generation

Liu, Xiaomin ; Lægsgaard, Jesper ; Iegorov, Roman ; Svane, Ask Sebastian ; Ilday, F. Ömer ; Tu, Haohua ; Boppart, Stephen A. ; Turchinovich, Dmitry
in journal: Photonics Research (ISSN: 2327-9125) (DOI: http://dx.doi.org/10.1364/PRJ.5.000750), vol: 5, issue: 6, pages: 750-761, 2017

Type: Journal article (Peer reviewed)

Status: Published     |    Year: 2017     |    DOI: http://dx.doi.org/10.1364/PRJ.5.000750

2016
 

Progress in Cherenkov femtosecond fiber lasers

Liu, Xiaomin ; Svane, Ask Sebastian ; Lægsgaard, Jesper ; Tu, Haohua ; Boppart, Stephen A. ; Turchinovich, Dmitry
in journal: Journal of Physics D: Applied Physics (ISSN: 0022-3727) (DOI: http://dx.doi.org/10.1088/0022-3727/49/2/023001), vol: 49, issue: 2, 2016

Type: Journal article (Peer reviewed)

Status: Published     |    Year: 2016     |    DOI: http://dx.doi.org/10.1088/0022-3727/49/2/023001

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Optimizing Yb concentration of fiber amplifiers in the presence of transverse modal instabilities and photodarkening

Lægsgaard, Jesper
in journal: Applied Optics (ISSN: 1559-128X) (DOI: http://dx.doi.org/10.1364/AO.55.001966), vol: 55, issue: 8, pages: 1966-1970, 2016

Type: Journal article (Peer reviewed)

Status: Published     |    Year: 2016     |    DOI: http://dx.doi.org/10.1364/AO.55.001966

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Hollow-core fibers for high power pulse delivery

Michieletto, Mattia ; Lyngsø, Jens K. ; Jakobsen, Christian ; Lægsgaard, Jesper ; Bang, Ole ; Alkeskjold, Thomas Tanggaard
in journal: Optics Express (ISSN: 1094-4087) (DOI: http://dx.doi.org/10.1364/OE.24.007103), vol: 24, issue: 7, pages: 7103-7119, 2016

Type: Journal article (Peer reviewed)

Status: Published     |    Year: 2016     |    DOI: http://dx.doi.org/10.1364/OE.24.007103

 

High-power picosecond pulse delivery through hollow core photonic band gap fibers

Michieletto, Mattia ; Johansen, Mette Marie ; Lyngsø, Jens Kristian ; Lægsgaard, Jesper ; Bang, Ole ; Alkeskjold, Thomas T.
part of: Proceedings of SPIE, 2016, SPIE - International Society for Optical Engineering,
Presented at:
Fiber Lasers XIII: Technology, Systems, and Applications, 2016, San Francisco, California

Type: Article in proceedings (Peer reviewed)

Status: Published     |    Year: 2016     |    DOI: http://dx.doi.org/10.1117/12.2211324

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Static thermo-optic instability in double-pass fiber amplifiers

Lægsgaard, Jesper
in journal: Optics Express (ISSN: 1094-4087) (DOI: http://dx.doi.org/10.1364/OE.24.013429), vol: 24, issue: 12, pages: 13429-13443, 2016

Type: Journal article (Peer reviewed)

Status: Published     |    Year: 2016     |    DOI: http://dx.doi.org/10.1364/OE.24.013429