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The optical properties of photonic crystals are closely related to their lattice constants, which are usually required to be in the same order of magnitude as the operating wavelength. In a crystal material, the photonic crystal structure is formed by the periodic arrangement in space of units whose dielectric constant is different from that of the crystal itself, and whose lattice constant depend...
For example, the commonly used square shell battery cells for power batteries include laser welding of cover explosion-proof valves, laser welding of pole columns, and laser welding of cover plates and shells. During the process of laser welding of aluminum alloy, it is easy to generate unqualified phenomena such as explosion points, pores, welding cracks, excessive depth and width of fusion. ...
Recently, Coherent Corp. announced the launch of the EDGE FL TM high-power fiber laser series, tailored specifically for cutting applications in the machine tool industry. The power levels of the EDGE FL series range from 1.5kW to 20kW, redefining the balance between value and performance to meet the growing demand for high-power, reliable laser sources in fiber laser cutting.With the increasing d...
Ensuring the integrity and quality of the welded hair clip is crucial in the assembly of electric motors. Usually, 160 to 220 hair clips are welded to each motor, and the accuracy of these welds directly affects the overall quality of the stator and motor. The traditional method of detecting these welds is difficult to balance the requirements of safety and accuracy, which often leads to damage to...
Terahertz waves have significant application value in communication and imaging. The nonlinear interaction between strong field ultrafast laser and matter is one of the important ways to generate terahertz waves. The experimental and theoretical research related to terahertz generation media such as plasma, gas, and crystal is relatively sufficient. However, liquid water is a strong absorbing medi...