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  1. Article ; Online: Broadband air-clad LP

    Mathew, Neethu Mariam / Grüner-Nielsen, Lars / Wang, Zepeng / Rishøj, Lars Søgaard / Rottwitt, Karsten

    Optics letters

    2021  Volume 47, Issue 1, Page(s) 38–41

    Abstract: Higher-order mode converters that work over a broad wavelength range are needed for various applications. A new, to the best of our knowledge, simple and cost-effective ... ...

    Abstract Higher-order mode converters that work over a broad wavelength range are needed for various applications. A new, to the best of our knowledge, simple and cost-effective LP
    Language English
    Publishing date 2021-12-24
    Publishing country United States
    Document type Journal Article
    ISSN 1539-4794
    ISSN (online) 1539-4794
    DOI 10.1364/OL.446055
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Mitigating probe pulse deformation in Raman amplification in OTDR fiber sensing systems.

    Wang, Zepeng / Vandborg, Mads Holmark / Joy, Tomin / Mathew, Neethu Mariam / Grüner-Nielsen, Lars / Rishøj, Lars Søgaard / Christensen, Jesper Bjerge / Jostmeier, Thorben / Marx, Benjamin / Hill, Wieland / Rottwitt, Karsten

    Optics express

    2023  Volume 31, Issue 7, Page(s) 11457–11470

    Abstract: We report the numerical and experimental study of probe pulse deformation in a forward-pumped distributed Raman amplifier on a 40-km standard single mode fiber. Distributed Raman amplification can improve the range of OTDR-based sensing systems, but it ... ...

    Abstract We report the numerical and experimental study of probe pulse deformation in a forward-pumped distributed Raman amplifier on a 40-km standard single mode fiber. Distributed Raman amplification can improve the range of OTDR-based sensing systems, but it could result in pulse deformation. A smaller Raman gain coefficient can be used to mitigate pulse deformation. The sensing performance can still be maintained by compensating for the decrease in the Raman gain coefficient by increasing the pump power. The tunability of the Raman gain coefficient and pump power levels are predicted while keeping the probe power below the modulation instability limit.
    Language English
    Publishing date 2023-05-08
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1491859-6
    ISSN 1094-4087 ; 1094-4087
    ISSN (online) 1094-4087
    ISSN 1094-4087
    DOI 10.1364/OE.482292
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Air-cladded mode-group selective photonic lanterns for mode-division multiplexing.

    Mathew, Neethu Mariam / Christensen, Jesper Bjerge / Grüner-Nielsen, Lars / Galili, Michael / Rottwitt, Karsten

    Optics express

    2019  Volume 27, Issue 9, Page(s) 13329–13343

    Abstract: We have fabricated an air-cladded mode-group selective photonic lantern, which can (de)multiplex the first two mode groups of a standard two-mode step-index fiber. Instead of relying on a low-index capillary tube, our simple solution uses air to form the ...

    Abstract We have fabricated an air-cladded mode-group selective photonic lantern, which can (de)multiplex the first two mode groups of a standard two-mode step-index fiber. Instead of relying on a low-index capillary tube, our simple solution uses air to form the surrounding "cladding" and thereby enable guiding at the end of the taper. Characterization of a 25-mm long lantern taper results in multiplexing crosstalk values between -20 dB and -12 dB for both modal inputs. The de-multiplexing values were around -12 dB for the fundamental mode, and slightly higher for the first higher-order (LP
    Language English
    Publishing date 2019-05-01
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1491859-6
    ISSN 1094-4087 ; 1094-4087
    ISSN (online) 1094-4087
    ISSN 1094-4087
    DOI 10.1364/OE.27.013329
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

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