Study Of The Random Lasing In Ceramics Material

The ceramics materials have many wonderful properities much good than other materials, such as, it can bear high-temperature,corrosion resisting and some other properities. While the random laser had been proposed many years ago, but with different reasons the phenomenon hadn’t been observed until90’s last century. After been found, great many sciences devoted themselves into the study of the so called "random laser". There were two main directions in the study of the random lasers, theoretic study which tried to find how the random laser came out and experiments which did different research on different materials with the purpose to find the random lasing phenomenons.At the same time,the ceramics can product random laser in experiment.In this letter, it used the experimental dates to simulate the experimental phenomenon in ceramic materials. The simulation use the FDTD method to simulate the random laser in ceramics with pores. Hoping that it will give some advice in the random laser in ceramics.First, some introduction was given which were about the excellent performance of ceramic materials and the development of the experiments and theoretic study in random lasers.Then, it give a more detail about the random lasers in theoretic study.Next, a introduction about the method as well as the theory which we used in the simulation--he Finite Difference Time Domain and the semi-classical theory of the random laser which coupled the rate equations and the Maxwell equations were given. It included the1D,2D and3D evolution equations about the electric field and magnetic field,the absorb bound condition-ABC, the stable of the solutions,the pulse sources which used to excite the energy level from boundary to highest energy level. All of these are necessary in our simulation.The fourth part of it give the simulation process and the results, I used the1D method to simulate the random laser and found the conditions for the random laser. We found the mode numbers wound increase with the boost of the pump rate utill it arrived some saturated situation.