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Passively Q-switched femtosecond-laser-written thulium waveguide laser based on evanescent field interaction with carbon nanotubes

  • Datos identificativos

    Identificador: imarina:4090811
    Autores:
    Kifle, EsromLoiko, PavelVazquez de Aldana, Javier RodriguezRomero, CarolinaRodenas, AiranChoi, Sun YungBae, Ji EunRotermund, FabianZakharov, ViktorVeniaminov, AndreyAguilo, MagdalenaDiaz, FrancescGriebner, UwePetrov, ValentinMateos, Xavier
    Resumen:
    © 2018 Chinese Laser Press. Surface channel waveguides (WGs) were fabricated in a monoclinic Tm3:KLu WO4 2 crystal by femtosecond direct laser writing (fs-DLW). The WGs consisted of a half-ring cladding with diameters of 50 and 60 μm located just beneath the crystal surface. They were characterized by confocal laser microscopy and μ-Raman spectroscopy, indicating a reduced crystallinity and stress-induced birefringence of the WG cladding. In continuous-wave (CW) mode, under Ti:sapphire laser pumping at 802 nm, the maximum output power reached 171.1 mW at 1847.4 nm, corresponding to a slope efficiency η of 37.8% for the 60 μm diameter WG. The WG propagation loss was 0.7 0.3 dB∕cm. The top surface of the WGs was spin-coated by a polymethyl methacrylate film containing randomly oriented (spaghetti-like) arc-discharge single-walled carbon nanotubes serving as a saturable absorber based on evanescent field coupling. Stable passively Q-switched (PQS) operation was achieved. The PQS 60 μm diameter WG laser generated a record output power of 150 mW at 1846.8 nm with η 34.6%. The conversion efficiency with respect to the CW mode was 87.6%. The best pulse characteristics (energy/duration) were 105.6 nJ/98 ns at a repetition rate of 1.42 MHz.
  • Otros:

    Autor según el artículo: Kifle, Esrom; Loiko, Pavel; Vazquez de Aldana, Javier Rodriguez; Romero, Carolina; Rodenas, Airan; Choi, Sun Yung; Bae, Ji Eun; Rotermund, Fabian; Zakharov, Viktor; Veniaminov, Andrey; Aguilo, Magdalena; Diaz, Francesc; Griebner, Uwe; Petrov, Valentin; Mateos, Xavier
    Departamento: Química Física i Inorgànica
    Autor/es de la URV: Aguiló Díaz, Magdalena / Díaz Castrillón, Fernanda / Díaz González, Francisco Manuel / Mateos Ferré, Xavier / RODENAS SEGUI, AIRAN / ROMERO TRIS, CRISTINA
    Palabras clave: @infoAeu @residentesaeu @uroweb Etiqueta «#» Hashtag
    Resumen: © 2018 Chinese Laser Press. Surface channel waveguides (WGs) were fabricated in a monoclinic Tm3:KLu WO4 2 crystal by femtosecond direct laser writing (fs-DLW). The WGs consisted of a half-ring cladding with diameters of 50 and 60 μm located just beneath the crystal surface. They were characterized by confocal laser microscopy and μ-Raman spectroscopy, indicating a reduced crystallinity and stress-induced birefringence of the WG cladding. In continuous-wave (CW) mode, under Ti:sapphire laser pumping at 802 nm, the maximum output power reached 171.1 mW at 1847.4 nm, corresponding to a slope efficiency η of 37.8% for the 60 μm diameter WG. The WG propagation loss was 0.7 0.3 dB∕cm. The top surface of the WGs was spin-coated by a polymethyl methacrylate film containing randomly oriented (spaghetti-like) arc-discharge single-walled carbon nanotubes serving as a saturable absorber based on evanescent field coupling. Stable passively Q-switched (PQS) operation was achieved. The PQS 60 μm diameter WG laser generated a record output power of 150 mW at 1846.8 nm with η 34.6%. The conversion efficiency with respect to the CW mode was 87.6%. The best pulse characteristics (energy/duration) were 105.6 nJ/98 ns at a repetition rate of 1.42 MHz.
    Áreas temáticas: Optics Electronic, optical and magnetic materials Atomic and molecular physics, and optics
    Acceso a la licencia de uso: https://creativecommons.org/licenses/by/3.0/es/
    ISSN: 23279125
    Direcció de correo del autor: fernanda.diaz@estudiants.urv.cat magdalena.aguilo@urv.cat xavier.mateos@urv.cat f.diaz@urv.cat
    Identificador del autor: 0000-0001-6130-9579 0000-0003-1940-1990 0000-0003-4581-4967
    Página final: 980
    Fecha de alta del registro: 2024-10-19
    Volumen de revista: 6
    Versión del articulo depositado: info:eu-repo/semantics/publishedVersion
    Enlace a la fuente original: https://www.osapublishing.org/prj/abstract.cfm?uri=prj-6-10-971
    URL Documento de licencia: https://repositori.urv.cat/ca/proteccio-de-dades/
    Referencia al articulo segun fuente origial: Photonics Research. 6 (10): 971-980
    Referencia de l'ítem segons les normes APA: Kifle, Esrom; Loiko, Pavel; Vazquez de Aldana, Javier Rodriguez; Romero, Carolina; Rodenas, Airan; Choi, Sun Yung; Bae, Ji Eun; Rotermund, Fabian; Zak (2018). Passively Q-switched femtosecond-laser-written thulium waveguide laser based on evanescent field interaction with carbon nanotubes. Photonics Research, 6(10), 971-980. DOI: 10.1364/PRJ.6.000971
    DOI del artículo: 10.1364/PRJ.6.000971
    Entidad: Universitat Rovira i Virgili
    Año de publicación de la revista: 2018
    Página inicial: 971
    Tipo de publicación: Journal Publications
  • Palabras clave:

    Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials,Optics
    Optics
    Electronic, optical and magnetic materials
    Atomic and molecular physics, and optics
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