Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
11003670 | Optics & Laser Technology | 2019 | 8 Pages |
Abstract
The present report explores third order nonlinear optical behavior of phase pure Yb3+:YAG nanoparticles for the first time by Z-scan technique. The measurement was carried out using diode pumped continuous wave (CW) Nd:YAG laser at 532â¯nm. The Yb:YAG nanoparticles exhibit characteristic near-infrared (NIR) emission at 1030â¯nm under 940â¯nm excitation. The nanoparticles exhibit high nonlinear refractive index (n2â¯=â¯8.649â¯Ãâ¯10â8â¯cm2/W) and low nonlinear absorption coefficient (βâ¯=â¯0.109â¯Ãâ¯10â4â¯cm/W) giving an appreciable figure of merit (FOM) of â¼74.50. The excitation power (8.2-10.5â¯Wâ¯cmâ2) dependent emission spectra were recorded to study exchange energy interaction of Yb3+ ions with YAG host lattice. By utilizing the nonlinear refractive index 'n2' from Z-scan measurement, thermo-optic coefficient (dn/dt) was calculated to demonstrate Yb3+:YAG nanomaterial for high power compact solid state laser gain amplifier systems.
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Authors
S. Arun Kumar, J. Senthilselvan, G. Vinitha,