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Thulium-doped fibre broadband source for spectral region near 2 micrometers

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    0469887 - ÚFE 2017 RIV PL eng J - Journal Article
    Písařík, M. - Peterka, Pavel - Aubrecht, Jan - Cajzl, Jakub - Benda, Adam - Mareš, D. - Todorov, Filip - Podrazký, Ondřej - Honzátko, Pavel - Kašík, Ivan
    Thulium-doped fibre broadband source for spectral region near 2 micrometers.
    Opto-Electronics Review. Roč. 24, č. 4 (2016), s. 223-231. ISSN 1230-3402. E-ISSN 1896-3757
    R&D Projects: GA MZd(CZ) NV15-33459A
    Institutional support: RVO:67985882 ; RVO:68378271
    Keywords : fibre lasers * amplified spontaneous emission * thulium-doped fibres
    OECD category: Optics (including laser optics and quantum optics)
    Impact factor: 1.449, year: 2016

    We demonstrated two methods of increasing the bandwidth of a broadband light source based on amplified spontaneous emission in thulium-doped fibres. Firstly, we have shown by means of a comprehensive numerical model that the full-width at half maximum of the thulium-doped fibre based broadband source can be more than doubled by using specially tailored spectral filter placed in front of the mirror in a double-pass configuration of the amplified spontaneous emission source. The broadening can be achieved with only a small expense of the output power. Secondly, we report results of the experimental thulium-doped fibre broadband source, including fibre characteristics and performance of the thulium-doped fibre in a ring laser setup. The spectrum broadening was achieved by balancing the backward amplified spontaneous emission with back-reflected forward emission
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