Structural origin of thermally induced refractive index changes in Yb <sup>3+</sup> /Al <sup>3+</sup> /P <sup>5+</sup> /F <sup>−</sup> ‐co‐doped silica glassMengting Guo, Lili Hu, Tongyao Zhao et al.|Journal of the American Ceramic Society|2021Cited by 9