High-resolution spectroscopy and emission decay in concentrated Nd:YAG ceramics

• DOI: 10.1364/josab.19.000360
• Publication Date: 2008-03-20T17:00:15Z
• Authors: Voicu Lupei; Aurelia Lupei; Serban Georgescu; Bogdan Diaconescu; Takunori Taira; Yoichi Sato; Sunao Kurimura; Akio Ikesue
• Keywords: Quantum Efficiency; Neodymium; Lattice (music)

The high-resolution spectroscopic and emission-decay investigation of highly concentrated (up to 9 at. %) Nd:YAG ceramics indicates that the state Nd3+ ion in these materials is similar diluted crystals. increased relative intensities spectral satellites connected with ensembles Nd ions near-lattice sites at high concentrations CNd consistent predictions statistics random placement available lattice sites. room-temperature transmission spectra show resonant pump emitting level 4F3/2, including hot-band Z2→R1 Z3→R2, can be efficient CNd, important effects reduction quantum defect corresponding heat generation under pump. accelerated 4F3/2 emission decay efficiency energy transfer, contribution migration-assisted transfer processes. calculated η figure merit ηCNd indicate components used for construction solid-state lasers free-generation or low-storage regimes, and, coupled level, they could enable scaling powers.