28 May 2014 Femtosecond cascaded third-harmonic generation with simultaneous walk-off effect by multigrating periodically poled MgO-doped lithium niobate
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Abstract
The explicit formula solutions of cascaded third-harmonic generation (THG) process were derived based on coupled-wave equations. Conversion efficiency (CE) with the simultaneous temporal walk-off effect is theoretically investigated by use of split-step Fourier transform method, and the obtained results show that the CE of cascaded THG can be adjusted by phase mismatch, i.e., Δk SHG and Δk THG . The walk-off effect can be eliminated to some extent by optimizing pump intensity. Using the multiple-grating periodically poled MgO-doped lithium niobate (MgO: PPLN), pumped by 50 fs optical parametric amplifier pulses, the CE of the cascaded THG was achieved (10.8%), and a detailed analysis was presented.
© 2014 Society of Photo-Optical Instrumentation Engineers (SPIE)
Wenchao You, Shuanggen Zhang, Xiurong Ma, Qingyue Wang, "Femtosecond cascaded third-harmonic generation with simultaneous walk-off effect by multigrating periodically poled MgO-doped lithium niobate," Optical Engineering 53(5), 056119 (28 May 2014). https://doi.org/10.1117/1.OE.53.5.056119
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