Zr:Yb:Ho:LiNbO3 crystals with various Zr4+ concentrations were grown.
Distribution coefficients of Zr4+ increase as the Zr4+ concentration increases.
Distribution coefficients of Yb3+ and Ho3+ ions decrease as the Zr4+ concentration increases.
The exposure energy of sample Zr5 is two orders higher than that of sample Zr0.