Population and Thermal Lensing Effect in $\text{Nd}^{3+}$ Doped Optical Materials

Le résumé fourni par la source

The population lens (PL) effect in the thermal lens (TL) signal is measured in Nd3+ doped optical materials. The time-dependent thermal lens signal is obtained from the divergence/convergence of the probe beam after the pulsed or continuous laser excitation. Thermal lens transients are measured for Nd3+ doped samples in different glass matrices, such as phosphate, fluoride, and low silica calcium aluminosilicate. Experimental results show different electronic and thermal effects depending on the glass matrices. The intensity ratio of PL and TL is relatively large at the probe beam wavelength and can be clearly differentiated when pulsed excitation is used.

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