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Ytterbium-doped nanostructured core silica fiber with built-in Bragg grating for laser applications

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cris.lastimport.scopus2024-02-12T19:20:18Z
dc.abstract.enWe report for the first time successful inscription of high reflectivity Bragg grating in nanostructured core active fiber. Nanostructurization of the fiber core allows to separate the active and photosensitive areas and to distribute them all over the core. As a result unfavorable clustering between germanium and ytterbium particles is avoided. The distribution of discrete glass areas with feature size smaller than λ/5 results in effectively continuous refractive index profile of the fiber core. We present a single-mode fiber with built-in Bragg grating for laser application with the core composed of ytterbium and germanium doped silica rods. The core structure is arranged as a regular lattice of 1320 doped with ytterbium and 439 doped with germanium silica glass rods. The average germanium doping level within the core of only 1.1% mol allowed efficient inscription of Bragg grating. The nanostructured core was 8.6 μm and the internal cladding was 112 μm in diameter coated with low index polymer to achieve the double-clad structure. In the first proof-of-concept in the laser setup we achieved 35 % of slope efficiency in relation to launched power for the fiber length of 18 m. The output was single-mode with spectrum width below 1 nm. The maximum output power limited by pumping diode was 2.3 W. The nanostructurization opens new opportunities for development of fibers with a core composed of two or more types of glasses. It allows to control simultaneously the refractive index distribution, the active dopants distribution and photosensitivity distribution in the fiber core.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorAnuszkiewicz, Alicja
dc.contributor.authorLisowska, Jolanta
dc.contributor.authorPysz, Dariusz
dc.contributor.authorMarkowski, Konrad
dc.contributor.authorJĘDRZEJEWSKI, KAZIMIERZ
dc.contributor.authorFranczyk, M.
dc.contributor.authorOsuch, Tomasz
dc.contributor.authorFILIPKOWSKI, ADAM
dc.contributor.authorBUCZYŃSKI, RYSZARD
dc.contributor.authorKASZTELANIC, RAFAŁ
dc.contributor.authorStefaniuk, Tomasz
dc.date.accessioned2024-01-28T12:21:29Z
dc.date.available2024-01-28T12:21:29Z
dc.date.issued2019
dc.description.financeNie dotyczy
dc.identifier.doi10.1117/12.2509913
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/139074
dc.identifier.weblinkhttps://www.spiedigitallibrary.org/conference-proceedings-of-spie/10914/109140L/Ytterbium-doped-nanostructured-core-silica-fiber-with-built-in-Bragg/10.1117/12.2509913.full?SSO=1
dc.languageeng
dc.pbn.affiliationphysical sciences
dc.publisher.ministerialSPIE – The International Society for Optics and Photonics
dc.relation.bookProceeding of SPIE 16th Conference on Integrated Optics: Sensors, Sensing Structures, and Methods
dc.relation.pages109140L-1 - 109140L-7
dc.rightsClosedAccess
dc.sciencecloudnosend
dc.titleYtterbium-doped nanostructured core silica fiber with built-in Bragg grating for laser applications
dc.typeMonographChapter
dspace.entity.typePublication