Data for article: Enhanced second harmonic generation performance in PPLN crystal using integrated fiber microlenses

Files include the data presented in the manuscript entitled: "Enhanced second harmonic generation performance in PPLN crystal using integrated fiber microlenses" by S. Matczak, D. Stachowiak and G. Soboń.Figure 2a presents the optical spectrum of the femtosecond laser used in the experiment.Figure 3 presents the measured second harmonic average power for different PPLN QPM periods in the reference bulk optics configurations.Figure 5 presents numerical calculations of beam propagation in air and in the PPLN crystal.Figure 6 presents the measured second harmonic average power for different PPLN QPM periods in a setup with the fabricated microlenses.Figure 7 presents the output characteristic of the femtosecond laser after the PPLN nonlinear crystal: (a) SHG spectra corresponding to all nine QPM periods, (b) corresponding pulse autocorrelations measurement with fitted pulse duration.