Figure 3
Numerical study.
Summary of numerical simulations of photonic crystal microchip laser: (a) shows the emission power, (b) the brightness and (c) the angular divergence of the emitted beam, depending on the pump power, for three realizations of spatial filters. The black line depicts the reference case (no filter), the red line corresponds to the filter with transmission profile corresponding to the experimental situation (Figs 1 and 2) and the green and blue lines correspond to the filters with 2 and 4 times increased filtering performance (correspondingly increased width of the filtering area). The near- and far-field beam profiles as well as averaged far-field profiles are shown on insets: the near field window size is 2 × 2 mm and far field windows size is 40 × 40 mrad.
