Light-induced absorption changes in In-doped congruent LiNbO[sub 3]

Sunarno, Steven; Tomita, Yasuo; Zhang, Guoquan
December 2002
Applied Physics Letters;12/9/2002, Vol. 81 Issue 24, p4505
Academic Journal
We investigate visible and near-infrared light-induced absorption changes caused by intrinsic defect centers in congruently melting and reduced LiNbO[sub 3]:In with a single-shot picosecond pulse at 532 nm. It is found that the dark decay dynamics of optically induced shallow centers strongly depend on In concentrations. Two types of optically induced shallow centers having dark decay time constants on the orders of milliseconds and tens of microseconds are observed in LiNbO[sub 3] doped with In below the damage-resistant threshold concentrations. Only one of the two types is observed in LiNbO[sub 3] doped with In above it. The origin of these shallow centers is also discussed.


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