Stationary and coherent spectroscopy of 167Er3+ in waveguides in 7LiYF4 crystalMansur Minnegaliev, Ravil Urmancheev, Konstantin Gerasimov, Alexander Kalinkin, Ivan Dyakonov, Mikhail Saygin, Sergey Kulik and Sergey MoiseevEPJ Web Conf., 161 (2017) 03019DOI: https://doi.org/10.1051/epjconf/201716103019