Basic Properties of Nd‐Doped GYSGG Laser Crystal

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Abstract
In the present work, we investigated the mechanical properties (including hardness, fracture toughness, brittleness index and yield strength) of Nd0.03Gd0.93Y2.04Sc2Ga3O12 (Nd:GYSGG) laser crystal using Vickers microhardness tester, for the first time. The defects morphology of Nd:GYSGG crystal were investigated by using chemical etching method with phosphoric acid etchant. The absorption spectrum of Nd:GYSGG from 300 to 2800 nm was measured at room temperature and the absorption peaks were assigned. The fluorescence lifetime of the 4F3/2→4I11/2 transition of Nd3+ in GYSGG is fitted to be 221.3 μs. The three Judd‐Ofelt intense parameters Ω2, 4, 6 were calculated to be 0.329 × 10−20 cm2, 2.761 × 10−20 cm2 and 4.222 × 10−20 cm2, respectively. All these demonstrate that Nd:GYSGG crystal is a good candidate laser material.
Funding Information
  • National Natural Science Foundation of China (51502292, 61405206)

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