外文题目: Manipulating refractive index, homogeneity and spectroscopy of Yb3+-doped silica-core glass towards high-power large mode area photonic crystal fiber lasers
作者: Wang, Fan; Hu, Lili; Xu, Wenbin; Wang, Meng; Feng, Suya; Ren, Jinjun; Zhang, Lei; Chen, Danping; Ollier, Nadege; Gao, Guojun; Yu, Chunlei; Wang, Shikai
刊名: Opt. Express
年: 2017 卷: 25 期: 21 页： 25960--25969
英文关键词:

PHOTODARKENING PROCESS; ALPO4 JOIN; YTTERBIUM; PHOTOLUMINESCENCE; TECHNOLOGY; DEPENDENCE; EFFICIENCY; AMPLIFIER; ALUMINUM; QUALITY
英文摘要:
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 (empty set 5 mm x 90 mm) YAFP silica-core glass rod with low average RI difference of 2.6 x 10(-4) (with respect to pure silica glass), and low radial and axial RI fluctuations of similar to 2 x 10(-4), was prepared. A LMA PCF with 50 mu m core diameter was obtained by stack-capillary-draw techniques using YAFP core glass. Its core NA is 0.027. An average amplified power of 97 W peaking at 1030 nm and light-light efficiency of 54% are achieved from a 6.5 m long PCF in the pulse amplification laser experiment. Meanwhile, quasi-single-mode transmission is obtained with laser beam quality factor M-2 of 1.4.


文献类型: 期刊论文
正文语种: English
收录类别: SCI
DOI: 10.1364/OE.25.025960


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