Title :
Efficiency of short-pulse type-I second-harmonic generation with simultaneous spatial walk-off, temporal walk-off, and pump depletion
Author :
Wang, Haifeng ; Weiner, Andrew M.
Author_Institution :
Sch. of Electr. & Comput. Eng., Purdue Univ., West Lafayette, IN, USA
Abstract :
We have developed a theory which for the first time predicts the efficiency of type-I second-harmonic generation (SHG) with simultaneous spatial and temporal walk-offs and with pump depletion. In order to validate our theory, we have compared its predictions with a numerical solver. We also have measured the conversion efficiency for type-I SHG in experiments with ∼120--fs laser pulses in BBO and LBO crystals long enough that both temporal and spatial walk-off are important. Comparison supports our theoretical analysis. Our theory provides a useful tool for estimating SHG efficiency with pulsed sources in both nondepletion and depletion regions.
Keywords :
barium compounds; high-speed optical techniques; lithium compounds; optical harmonic generation; optical materials; optical pumping; BBO; BaB2O4; LiBO3; SHG efficiency; conversion efficiency; depletion regions; laser pulses; nondepletion regions; numerical solver; pump depletion; short-pulse type-I second-harmonic generation; spatial walk-off; temporal walk-off; type-l SHG; Biomedical optical imaging; Laser theory; Nonlinear optical devices; Nonlinear optics; Optical harmonic generation; Optical pulse shaping; Optical pulses; Optical pumping; Pulse measurements; Ultrafast optics;
Journal_Title :
Quantum Electronics, IEEE Journal of
DOI :
10.1109/JQE.2003.819531
