Počet záznamů: 1
Impact of shaping optical fiber preforms based on grinding and a CO(2 )laser on the inner-cladding losses of shaped double-clad fibers
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SYSNO ASEP 0537512 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Impact of shaping optical fiber preforms based on grinding and a CO(2 )laser on the inner-cladding losses of shaped double-clad fibers Tvůrce(i) Jasim, Ali (URE-Y)
Podrazký, Ondřej (URE-Y) RID
Peterka, Pavel (URE-Y) RID
Kamrádek, Michal (URE-Y)
Kašík, Ivan (URE-Y) RID
Honzátko, Pavel (URE-Y) RIDCelkový počet autorů 6 Zdroj.dok. Optics Express. - : Optical Society of America - ISSN 1094-4087
Roč. 28, č. 9 (2020), s. 13601-13615Poč.str. 15 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova Carbon dioxide ; glass ; Silica Vědní obor RIV BH - Optika, masery a lasery Obor OECD Optics (including laser optics and quantum optics) CEP GA19-03141S GA ČR - Grantová agentura ČR Způsob publikování Open access Institucionální podpora URE-Y - RVO:67985882 UT WOS 000530854700086 EID SCOPUS 85084625389 DOI 10.1364/OE.386571 Anotace We experimentally compared for the first time, two techniques of optical fiber preform shaping based on the mechanical grinding and thermal CO2 laser processing from the point of the inner-cladding losses. The shaped pretbrms were fabricated of coreless pure silica technical rods as well as high purity silica Heraeus F300 rods and drawn them into coreless multimode fibers with various inner-cladding geometries coated with a low index fluorinated polymers. The background losses of the fibers were measured via the cut-back method and compared to the losses of the unshaped fibers with a circular cross-section. Results show that both preform-shaping techniques would induce additional losses in the inner-cladding. High surface scattering losses were observed in the mechanically-grinded fibers. On the other hand, the mechanical grinding retains the advantage of a significant reduction of attenuation peaks attributed to OH-groups that penetrated into the preform surface during the preform collapse. On the contrary, CO2 laser thermal-shaping provides the advantage of quick, fully automated shaping with smooth surface finish and induces much lower scattering losses, but it is not so effective in removing water penetrated surface layer of the preform so that OH-groups diffuse deeper towards the preform center. Additionally, laser thermal-shaping allows processing the preform to complex shapes which are more effective in scrambling cladding modes. Some of the absorption peaks of OH-groups and fluorinated polymers may be rather close to common pumping wavelengths and this should be considered in the design of the double-clad fibers and selection of proper shaping technology Pracoviště Ústav fotoniky a elektroniky Kontakt Petr Vacek, vacek@ufe.cz, Tel.: 266 773 413, 266 773 438, 266 773 488 Rok sběru 2021 Elektronická adresa https://doi.org/10.1364/OE.386571
Počet záznamů: 1