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Holmium monolithic fiber lasers: An investigation of the fiber Bragg grating spatial dimensions on fiber laser performance
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SYSNO ASEP 0555642 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Holmium monolithic fiber lasers: An investigation of the fiber Bragg grating spatial dimensions on fiber laser performance Author(s) Theodosiou, A. (CY)
Aubrecht, Jan (URE-Y) RID
Peterka, Pavel (URE-Y) RID
Kalli, K. (CY)Number of authors 4 Article number 117730L Source Title Proceedings of SPIE, Micro-structured and Specialty Optical Fibres VII, 11773. - BELLINGHAM : SPIE, 2021 / Kalli K. - ISSN 0277-786X - ISBN 978-1-5106-4381-9 Number of pages 9 s. Publication form Print - P Action Conference on Micro-structured and Specialty Optical Fibres VII Event date 19.04.2021 - 23.04.2021 VEvent location Virtual, Online Country US - United States Event type WRD Language eng - English Country US - United States Keywords Femtosecond laser ; Fiber Bragg gratings ; Medium infrared fiber lasers Subject RIV BH - Optics, Masers, Lasers OECD category Optics (including laser optics and quantum optics) Institutional support URE-Y - RVO:67985882 UT WOS 000696183900009 EID SCOPUS 85109214821 DOI 10.1117/12.2592374 Annotation We have investigated how the physical dimensions of a fiber Bragg grating (FBG) may affect the performance of a monolithic fiber laser system. In particular, we perform a series of direct laser inscriptions in a Holmium-doped single mode fiber using the plane-by-plane femtosecond laser inscription method, using exactly the same inscription conditions but having different grating widths. Specifically, the gratings were divided in to three groups, group 1, gratings inscribed with planes having widths smaller of the core size but in the center of the fiber, group 2, gratings inscribed with plane widths similar to the core diameter and group 3, gratings with plane widths larger the core diameter that were extended uniformly in to cladding region. All the gratings were characterized in a fiber laser configuration and their performance were analyzed using as metrics the threshold power, the effective length and the power slope efficiency. We note that all the gratings were designed to have a resonance Bragg wavelength at 2.1 mu m, having the same length and inscribed directly through the fiber coating. The monolithic fiber laser strands were pumped using Thulium-doped fiber laser operating at 1.95 mu m. The results clearly show that the spatial dimensions of the FBGs are certainly an important parameter that is required for consideration during the development of the monolithic fiber lasers, especially for medium and high-power fiber laser systems 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 2022
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