研究目的
To investigate the effect of ion concentration on the saturation intensity and its impact on the evaluation of nonlinear optical properties in Nd-doped phosphate glass matrix.
研究成果
The study concludes that the saturation intensity should not be calculated directly from the experimental lifetime of the sample but should use τ0,0 for accurate determination. The polarizability difference Δα was found to be independent of the dopant ion concentration in the matrix.
研究不足
The study focuses on the electronic origin of refractive index changes and does not consider thermal effects. The accuracy of Is determination is crucial for the correct evaluation of nonlinear optical parameters.
1：Experimental Design and Method Selection:
The study used the time resolved Z-scan technique and lifetime measurements to investigate the nonlinear optical properties of Nd-doped phosphate glass.
2：Sample Selection and Data Sources:
Samples were synthesized by the fusion method with different concentrations of Nd3+ ions.
3：List of Experimental Equipment and Materials:
An Argon-ion laser at 514 nm, mechanical chopper, Si PIN photodiode, digital oscilloscope, and a beam waist meter were used.
4：Experimental Procedures and Operational Workflow:
Lifetime measurements were performed with controlled exposure time, and Z-scan measurements were carried out to evaluate the nonlinear refractive index.
5：Data Analysis Methods:
The data were analyzed to determine the saturation intensity and polarizability difference between ground and excited states.
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