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Manipulating refractive index, homogeneity and spectroscopy of Yb$^{3+}$-doped silica-core glass towards high-power large mode area photonic crystal fiber lasers

Wang, Fan; Hu, Lili; Xu, Wenbin; Wang, Meng; Feng, Suya; Ren, Jinjun; Zhang, Lei; Chen, Danping; Ollier, Nadège; Gao, Guojun; Yu, Chunlei; Wang, Shikai

Output power scaling of single mode large mode area (LMA) photonic crystal fiber (PCF) amplifiers urgently requires the low refractive index of Yb³⁺-doped silica glasses whilst maintaining high optical homogeneity. In this paper, we report on a promising alternative Yb³⁺/Al³⁺/F¯/P⁵⁺-co-doped silica core-glass (YAFP), which is prepared by modified sol-gel method developed by our group and highly suitable for fabricating high power LMA PCF amplifiers. By controlling the doping combinations of Al³⁺/F¯/P⁵⁺ in Yb³⁺- doped silica glass,it not only ensures low refractive index (RI) but also maintains the excellent optical homogeneity and spectroscopic properties of Yb³⁺. The spectroscopic properties of Yb³⁺ ions have not deteriorated by the co-doping of F¯ and P⁵⁺ in YAFP glass compared with that of Yb³⁺/Al³⁺ co-doped silica glass. A large-size (⌀5 mm × 90 mm) YAFP silica-core glass rod with low average RI difference of 2.6 × 10¯⁴ (with respect to pure silica glass), and low radial and axial RI fluctuations of ~2 × 10¯⁴, was prepared. A LMA PCF with 50 μm core diameter was obtained by stack-capillary-draw techniques using YAFP core glass. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000075729
Veröffentlicht am 16.11.2018
DOI: 10.1364/OE.25.025960
Zitationen: 8
Web of Science
Zitationen: 4
Zugehörige Institution(en) am KIT Institut für Mikrostrukturtechnik (IMT)
Publikationstyp Zeitschriftenaufsatz
Jahr 2017
Sprache Englisch
Identifikator ISSN: 1094-4087
KITopen-ID: 1000075729
HGF-Programm 43.23.04 (POF III, LK 01)
Erschienen in Optics express
Band 25
Heft 21
Seiten Art.Nr. 25960
Nachgewiesen in Web of Science
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