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Pump absorption in coiled and twisted double-clad hexagonal fiber: effect of launching conditions and core location
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SYSNO ASEP 0500237 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Pump absorption in coiled and twisted double-clad hexagonal fiber: effect of launching conditions and core location Author(s) Dalidet, R. (FR)
Peterka, Pavel (URE-Y) RID
Doya, V. (FR)
Aubrecht, Jan (URE-Y) RID
Koška, Pavel (URE-Y)Number of authors 5 Article number 105122P Source Title Fiber Lasers XV: Technology and Systems, Proceedings of SPIE, 10512. - Bellingham : SPIE, 2018 / Hartl I. ; Carter A.L. - ISSN 0277-786X - ISBN 978-151061509-0 Number of pages 6 s. Publication form Print - P Action Fiber Lasers XV: Technology and Systems Event date 29.01.2018 - 01.02.2018 VEvent location San Francisco Country US - United States Event type WRD Language eng - English Country US - United States Keywords fiber design and fabrication ; fiber lasers ; optical pumping Subject RIV JA - Electronics ; Optoelectronics, Electrical Engineering OECD category Electrical and electronic engineering R&D Projects TH01010997 GA TA ČR - Technology Agency of the Czech Republic (TA ČR) LD15122 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support URE-Y - RVO:67985882 UT WOS 000432469600072 EID SCOPUS 85045613848 DOI 10.1117/12.2286613 Annotation ver extending applications of fiber lasers require energy efficient, high-power, small footprint and reliable fiber lasers and laser wavelength versatility. To meet these demands, next generation of active fibers for high-power fiber lasers is coming out that will eventually offer tailored spectroscopic properties, high robustness and reduced cooling requirements and improved efficiency through tailored pump absorption. We report on numerical modelling of the efficiency of the pump absorption in double clad active fibers with hexagonal shape of the inner cladding cross section and rare-earth doped core. We analyze both the effect of different radii of the spool on which the fiber is coiled and different fiber twisting rates. Two different launching conditions were investigated: the Gaussian input pump beam and a speckle pattern that mimics the output of the pump laser diode pigtail. We have found that by asymmetric position of the rare-earth-doped core we can significantly improve the pump absorption Workplace Institute of Radio Engineering and Electronics Contact Petr Vacek, vacek@ufe.cz, Tel.: 266 773 413, 266 773 438, 266 773 488 Year of Publishing 2019
Number of the records: 1