Approximate formulas of transient temperature and stress distributions in the slab of a two-side pumped heat capacity laser are attained by solving the heat diffusion equation. Based on the formulas, the distributions of temperature and stress during the pump period of a two-sided symmetrically laser diode array (LDA) pumped Nd:GGG slab laser with 5-kW average output power are numerically simulated. The results show that the temperature in the slab will averagely increase by more than 70 Celsius degrees after operating for 10 seconds; the stress and maximum of the temperature difference in the slab are about 30 MPa and 24 Celsius degrees, respectively. The thermal induced effects are discussed also.
© 2006 Chinese Optics Letters
Yue Dong, Jifeng Zu, Liqun Hou, Xianhua Yin, Tao Zhang, Yalong Gu, Zhigang Liu, and Jianqiang Zhu, "Approximate formulas of temperature and stress distributions and thermal induced effects in a heat capacity slab laser," Chin. Opt. Lett. 4, 326-328 (2006)