Martínez Matos, ÓscarTorchia, Gustavo AdriánVaveliuk, PabloTocho, Jorge Omar2023-06-202023-06-202001-07-300953-898410.1088/0953-8984/13/30/313https://hdl.handle.net/20.500.14352/59024© 2001 IOP Publishing Ltd.The importance of the role of the ion-lattice coupling in determining the energy levels of Cr^3^+ ions in congruent LiNbO_3 crystals doped with 2.9% of ZnO is demonstrated in this paper. The Racah parameters: B = 533 cm^-1, C = 3244 cm^-1 and the crystal-field intensity Dq = 1527 cm^-1 were determined and the Tanabe-Sugano diagram was constructed. The characteristics of the absorption and the emission spectra of Cr^3^+ ions in these crystals can be explained in terms of the configurational-coordinate diagram in the harmonic approximation, with good agreement obtained. The Huang-Rhys parameter S = 6.86 and the lattice phonon energy hbarω = 343 cm^-1 are also reported in this work.engjournal articlehttp://dx.doi.org/10.1088/0953-8984/13/30/313http://iopscience.iop.orgopen access535Site DistributionCr^3^+ IonsLIMBO3MGODependenceÓptica (Física)2209.19 Óptica Física