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This manuscript provides a comprehensive analysis of the characteristics of unavoidable thermal effects in solid-state lasers and an end-to-end solution for the heat generated inside the gain medium. After a description of the basic physical mechanisms (Quantum defect, Upconversion, and Thermal Quenching of Fluorescence), Total Heat Generation Coefficient is calculated for suitable holder designed used in the practical operating conditions of a cavity to reduce the thermal effects and to increase lasing efficiency. In particular, simulations that have been performed with a finite-element model is used to theoretically simulate thermal lensing in Cr:Nd:GSGG crystals with pumping scenarios. The predicted values for thermally induced strengths are compared with experimentally observed previous results. Finally, necessary calculations for the new crystal holder design were made by the help of the simulation modelling for a 1.5 W Gaussian (TEM00) laser diode double-end-pumped slab geometry Cr:Nd:GSGG crystal. The results were discussed deeply, and it is proven that the new holder design for this gain medium is suitable. [ABSTRACT FROM AUTHOR]

In this study, two different ventilated brake discs were manufactured and their braking force performances and heat generations were investigated experimentally together with a solid disc. Braking force outputs were examined in sudden and continuous braking conditions and disc temperatures were simply measured in continuous braking conditions. Fourteen pedal forces were used in sudden braking tests and eight periodic measurements were executed in continuous braking tests. Experiment results showed that ventilation applications not only increased the brake force outputs up to 42.6 %, but also reduced the heat formation on discs up to 31.5 % depending on test conditions. [ABSTRACT FROM AUTHOR]

In this study, two different ventilated brake discs were manufactured and their braking force performances and heat generations were investigated experimentally together with a solid disc. Braking force outputs were examined in sudden and continuous braking conditions and disc temperatures were simply measured in continuous braking conditions. Fourteen pedal forces were used in sudden braking tests and eight periodic measurements were executed in continuous braking tests. Experiment results showed that ventilation applications not only increased the brake force outputs up to 42.6 %, but also reduced the heat formation on discs up to 31.5 % depending on test conditions. [ABSTRACT FROM AUTHOR]