A novel ridge-waveguide multisection (MS) distributed feedback (DFB) laser, which consists of two identical DFB sections but different ridge widths, is proposed
The characteristics of femtosecond laser pumped conical emission in quadratic media of β-barium borate (BBO)crystals are analysed. A minimized dispersion phase
Selection statics of the Akaike information criterion (AIC) model and the Bayesian information criterion (BIC)model are applied to the Λ-cold dark matter (ΛCD