Zahra Danesh Kaftroudi, Esfandiar Rajaei,
Volume 11, Issue 1 (1-2017)
Abstract
In this study, we have theoretically investigated the effect of electron stopper layer on internal temperature distribution of high performance vertical cavity surface-emitting laser emitting at 1305 nm. Simulation software PICS3D, which self-consistently combines the 3D simulation of carrier transport, self-heating, gain computation and wave-guiding, was used. Simulation results show that change the electron stopper layer properties affect the internal temperature distribution of the device. The temperature of the active region increases compared with the original device. Comparison of temperature distribution in devices with different electron stopper layer confirms that optimized structure operates at maximum temperature.
Hasan Ebadian, Mohammad Mahdi Moslem, Nabiollah Azarpoor,
Volume 17, Issue 1 (1-2023)
Abstract
The simulation results of a 10-kW heat capacity slab laser are presented. Two different schemes for optical pumping with high-power laser diodes are investigated. The simulation of optical pumping using ZEMAX software demonstrates a uniform pump distribution within the laser slabs. Additionally, the temperature distribution in the laser slab is examined using COMSOL. The findings for two distinct laser designs reveal that increasing the slab dimensions reduces the temperature distribution and thermal issues. Furthermore, cooling schemes indicate that the cooling phase of a 10-kW HCL falls within the range of 20-40 seconds. A comparison of water and air cooling of the optically pumped slabs during the cooling phase demonstrates that water cooling is more efficient than air cooling. The simulation results confirm that the proposed laser will be an efficient device for laser material processing. A focused 10-kW HCL laser will melt the steel sheet after less than 1 s at 1490 K.
