The work is aimed at creating matching passive elements with optical planar devices. A three-dimensional structure-interface was made to match the position of the center of the optical fiber with active optical elements. NaYF4  microparticles doped with rare-earth ions Yb3+, Tm3+, Er3+ with a diameter of 2.2 µm and 1.65 um were synthesized. The formation of hemispherical lenses with radii from 0.75 to 25 um has been demonstrated for optical matching with optical fiber by IR (infrared) photopolymerization.