Temperature dependence of the ability of optical glass to withstand 10-msec laser pulses

Simulation study on laser damage threshold of optical window materials

“…The temperature field distribution, T(x,y,z,t), is a function of time and space. [5] The partial differential equation for the heat conduction of the material temperature field is obtained by using the law of conservation of energy and Fourier's law of heat conduction…”

“…In equation (2)(3)(4)(5), Q is the heat generated by the material per unit of time, the Δ is the increment of the internal energy of the material per unit time, and W is the work done externally by the material. k9 glass is studied in this paper, and the distortion is on the order of milliseconds, so W can be neglected.…”