Third-harmonic generation by cascading second-order nonlinear processes in a cerium-doped KTiOPO4 crystal.
We have achieved effective third-harmonic generation (THG) by cascading second-harmonic and sum-frequency generation in a single cerium-doped KTiOPO (4) crystal by using femtosecond laser pulses at 1.32 microm. A conversion efficiency of 0.17% was achieved with an average pump power of 35 mW.Furthermore, a unique quadratic power dependence for this type of THG was confirmed. We developed a theory and obtained an analytical solution for the THG.The solution exactly describes the measured characteristics of the THG.
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Gu
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Makarov
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Ding
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Wang
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Wei
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Liu
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