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Effect of irradiation symmetry of CO2 laser on mode coupling in long-period gratings inscribed in photonic crystal fiber

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    SYSNO ASEP0396748
    Document TypeC - Proceedings Paper (int. conf.)
    R&D Document TypeConference Paper
    TitleEffect of irradiation symmetry of CO2 laser on mode coupling in long-period gratings inscribed in photonic crystal fiber
    Author(s) Tian, F. (US)
    Kaňka, Jiří (URE-Y)
    Zou, B. (HK)
    Chiang, K.S. (HK)
    Du, H. (US)
    Number of authors5
    Source TitleFIBER OPTIC SENSORS AND APPLICATIONS X (Proceedings of SPIE 8722), 8722. - BELLINGHAM : SPIE, 2013 / Udd E. ; Pickrell G. ; Du H.H. - ISSN 0277-786X - ISBN 978-0-8194-9513-6
    Number of pages8 s.
    Publication formMedium - C
    ActionConference on Fiber Optic Sensors and Applications X
    Event date02.05.2013-03.05.2013
    VEvent locationBaltimore
    CountryUS - United States
    Event typeWRD
    Languageeng - English
    CountryUS - United States
    KeywordsPhotonic crystal fiber ; long-period grating ; mode coupling
    Subject RIVJA - Electronics ; Optoelectronics, Electrical Engineering
    R&D ProjectsLD11030 GA MŠk - Ministry of Education, Youth and Sports (MEYS)
    Institutional supportURE-Y - RVO:67985882
    UT WOS000323340200012
    DOI10.1117/12.2016194
    AnnotationLong-period gratings (LPG) are inscribed in endlessly single mode (ESM) photonic crystal fiber (PCF) and conventional single mode fiber (SMF) with symmetric and asymmetric CO2 laser irradiation. Transmission measurements and near-field imaging indicate that symmetric index perturbation induced by laser irradiation with the aid of a 120 degrees gold-coated reflecting mirror results in LP0n symmetric mode coupling, while asymmetric irradiation without using the mirror leads to LP1n asymmetric mode coupling for both fiber types. Symmetric irradiation yields far more reproducible LPG in PCF than asymmetric irradiation. On the other hand, the irradiation symmetry has little effect on the reproducibility of LPG inscribed in SMF due to the isotropy of its all-solid cladding structure. The removal of the outer solid cladding of PCF-LPG results in a significant change in its transmission characteristics, which provides rich information on the refractive index perturbation and mode field distribution in the outer solid cladding of PCF-LPG
    WorkplaceInstitute of Radio Engineering and Electronics
    ContactPetr Vacek, vacek@ufe.cz, Tel.: 266 773 413, 266 773 438, 266 773 488
    Year of Publishing2014
Number of the records: 1