Modeling and Monte Carlo simulation on photothermal effect in Gd₃Al₃Ga₂O₁₂:Ce³⁺/Y₃Al₅O₁₂:Cr³⁺ layered composite ceramic

Abstract

Layered composite ceramics have wide application in solid‐state lasers. However, the photothermal effect in the layered ceramics has not been clarified, due to the interface effect between layers. In this work, the model of photon propagation and thermal distribution in the Gd3Al3Ga2O12:Ce3+/Y3Al5O12:Cr3+ layered ceramics are established. The property of photon absorption, reflection, transmission, and thermal distribution are studied by combining the Monte Carlo method and the convolution method. It is found that the photon absorption distribution and thermal distribution of this layered ceramics show the gradient change. Furthermore, this change is strongly dependent on the type, beam width, and power of laser. The temperature of layered ceramics induced by Gaussian beam is higher than that induced by flat circular beam. This work provides a useful research method for the design of layered ceramic materials with excellent scintillation performance.

Structural, optical, and thermodynamic properties of an LiCa2Mg2As3xV3−3xO12 solid‐solution garnet

“…An example is single‐mode fiber lasers that need a cladding with n just slightly lower than that of the doped core, 16–18 high k to dissipate heat, and similar thermal expansion ( α ) between fiber core and cladding to minimize undesirable photoelastic effects and interfacial cracking 19–21 . Other composite waveguides and phosphors have similar property requirements 22–27 …”

“…[19][20][21] Other composite waveguides and phosphors have similar property requirements. [22][23][24][25][26][27] There is usually significant solid-solution between most garnet compositions, 28,29 so formation of a new phase is less likely in short times at high or intermediate temperatures. The thermal expansion of most garnets is similar, 30,31 so thermal residual stress for co-processed systems is low.…”