The spectral contributions to the Yb3+ bandwidth in CNGG-type laser crystals have been disclosed by combining 6 K spectroscopy, knowledge of their crystal structures and CF modeling of Yb3+ energy levels.
Lasing-relevant processing and physical properties of Yb-doped Ca3(NbGa)5O12-CNGG-type disordered garnet crystals are discussed. Future directions for Yb3+ bandwidth and laser performance improvements are foreseen.
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