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In the following experiments and the development of the thermal effects of the numerical investigation report diode laser pumped all-solid-state lasers and special optical resonator. Thermal lensing and stress-induced birefringence is used to compare four different cooling technologies. To fully validate the numerical finite element (FE) code, it also applies to distinguish the contribution of the thermal lens effect - for example, curved surfaces and refractive index changes with temperature and stress tortuous analysis of high-power laser power adjustment limit. Further power adjustment function is required the use of the longer side-pumped laser rod rod resonator. Multi-rod resonator is particularly suitable for the scale of the order of tens of watts of output power, high beam quality laser output power.
There is some requirement about using cell phone jammer
Laser resonators with polarizing elements. Thermally induced birefringence is negligible non-isotropic laser host materials due to the strong intrinsic birefringence. However, due to the fracture limit of the laser rod, thermally induced stresses, the tensile stress, in particular, has always been restrictions on the pump power, YAG fracture limit of about 150MPa tensile stress (negative values correspond to compressive stress). Different cooling methods ND; of YAG rod maximum pressure distribution will be discussed in Figure 4. The crystal structure of the pump power and pump beam characteristics and the same as the previous. Large tensile stress in the case of non-cooling and water-cooled rod, the maximum values of 29 MPa and 37 the MPA. These two methods are shown to pump the cooling water in 30% of the pressure increase in the surface near the center of the maximum stress occurs. More cell phone jammer of better quality will be used in the examination.
The other two cooling methods show the surface of the rod hydraulic cylinders, 2-3 mm, which significantly reduce the maximum stress is located away from the pump end of about 14 MPa. These figures clearly show that the surface of solid-state cooling pump is very effective in reducing the tensile stress in the laser rod. Birefringence polarizers in the the uncooled face (Figure 1A) and 50-watt pump and double-pass laser rod thermal depolarization loss, shown in Figure 5. Qualitative measurement (Figure 5a) and analog (Figure 5b) the connection is currently being carried out in a very good quantitative comparison. Concentric stripes of the thermally induced lens in Figure 5a. In the calculations only take into account the birefringence. Figures 5a and 5b, the pump power at the pump with a radius of 0.5 mm.