Abstract
A new dye, trans-4-[ p-( N-ethyl- N-hydroxyethylamino)styryl]- N-methylpyridinium iodide has been synthesized, and the two-photon absorption (TPA), TPA-induced frequency up-conversion emission, and two-photon pumped frequency up-converted lasing properties of this new dye were experimentally studied. This new dye has a TPA cross-section of σ 2=7.0×10 −48 cm 4 s/photon at 1064 nm, and exhibits a high lasing efficiency. The net conversion efficiency from the absorbed 1064 nm pump pulse energy to the 632 nm up-converted lasing energy is 4.3% at the pump power of 4 mJ.
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