Induced heating by nonlinear absorption in LiNbO3-type crystals under continuous-wave laser irradiation
Induced heating by nonlinear absorption in LiNbO3-type crystals under continuous-wave laser irradiation
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连续波激光照射下 LiNbO3 型晶体非线性吸收诱导加热
DOI:
10.1016/j.optmat.2014.11.029
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发表时间:
2015
影响因子:
3.9
通讯作者:
Norikatsu Mio
中科院分区:
文献类型:
--
作者:
Susumu Kato;Sunao Kurimura;Hwan Hong Lim;Norikatsu Mio
We investigate light-induced heating by nonlinear absorption in LiNbO3-type crystals under continuous-wave (CW) laser irradiation. The heat source is one-photon absorption by long-lived excited states created by two-photon absorption. The accumulated effect of excited states, which act as light absorbers, is significant for a CW laser. Light-induced heating causes catastrophic CW laser breakdown in LiNbO3-type crystals in which the band-gap energy is less than twice the photon energy and in which long-lived excited states, like polarons, can exist. For LiNbO3, the threshold intensity for catastrophic breakdown is estimated to be in the order of MW/cm2.
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