Chinese Journal of Lasers, Volume. 20, Issue 5, 389(1993)
Two-photon absorption of 5F4level of Ho3+ion in HoP5O14noncrystalline
Two-photon absorption phenomenon of Ho3+ ion in HoP5O14 noncrystalline induced by 1.06 μm of Nd:YAG pulsed laser is reported. We fond it is a direct, not step by step, two-photon process storting from 5I8 state and can be ascribed to the third order perturbation resulted from spin-orbit interaction.
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[in Chinese], [in Chinese], [in Chinese]. Two-photon absorption of 5F4level of Ho3+ion in HoP5O14noncrystalline[J]. Chinese Journal of Lasers, 1993, 20(5): 389