Spectroscopy of C3i and C2 sites of Nd3+-doped Lu2O3 sesquioxide either as ceramics or crystal

Nd3+-doped Lu2O3 transparent sesquioxide ceramics elaborated by the Spark Plasma Sintering (SPS) method. Part 1: Structural, thermal conductivity and spectroscopic characterization

“…This absorption cross section is then larger than that of 3.0 Â 10 À20 cm 2 reported by Hao et al [28] and more particularly higher than that 1.8 Â 10 À20 cm 2 of another sample prepared by SPS at IMR (Tohoku University, Sendai, Japan) in the same furnace, published by An et al [29] after this presentation. Moreover, the large value calculated in this work (and also in other papers) does not take into account of the repartition of Nd 3+ ions between C 2 and C 3i sites with the experimental ratio measured as 80% and 20% respectively [26].…”

“…The distances have been taken from Lupei and Lupei [25] applied to Y 2 O 3 material of the same sesquioxide structure. The detailed analysis of both C 2 , and C 3i sites, satellites for both Nd 3+ and Yb 3+ ions in Lu 2 O 3 ceramics and crystals will be published elsewhere [26].…”

Specifics of Spectroscopic Features of Yb3+‐Doped Lu2O3 Laser Transparent Ceramics

“…The shift of the absorption line corresponding to C 3 i sites toward higher energies compared with that corresponding to C 2 sites has already been observed for other trivalent rare‐earth ions like Nd 3+ in C 3 i and C 2 sites of Nd 3+ ‐doped Lu 2 O 3 sesquioxide either as ceramics or crystals and also for Sm 3+ and Eu 3+ ions. [ 29 ]…”

“…As regards, considering Nd 3+ ‐doped Lu 2 O 3 laser single crystals grown by the μ‐PD method and Nd 3+ ‐doped Lu 2 O 3 laser ceramics fabricated by the nonconventional spark plasma sintering (SPS) method, we have already performed and compared results for these types of materials. [ 27–29 ] However, the best laser results were obtained for Nd 3+ ‐doped Lu 2 O 3 transparent ceramics fabricated by Ikesue using the solid‐state mixing of the oxide method and sintering by the hot isostatic pressing (HIP) technique. [ 9,10 ]…”

“…[26] As regards, considering Nd 3þ -doped Lu 2 O 3 laser single crystals grown by the μ-PD method and Nd 3þ -doped Lu 2 O 3 laser ceramics fabricated by the nonconventional spark plasma sintering (SPS) method, we have already performed and compared results for these types of materials. [27][28][29] However, the best laser results were obtained for Nd 3þ -doped Lu 2 O 3 transparent ceramics fabricated by Ikesue using the solid-state mixing of the oxide method and sintering by the hot isostatic pressing (HIP) technique. [9,10] The same approach has been applied to compare the spectroscopic properties of Yb 3þ ion, another important laser ion, in both Lu 2 O 3 crystals grown by the μ-PD technique and Lu 2 O 3 transparent ceramics fabricated by the SPS method.…”