Fig. 3.

Increase of the magnitude and penetration depth of the light fluence rate by using the light catcher. Panels (a) and (b) depict the distribution of the fluence rate in dB [-250, −10] at 30 ns without and with the light catcher, respectively. The contours of the magnitude are overlaid on the figures to provide a quantitative comparison. The white dash-dotted circle presents the position of the target. Panels c and d are the fluence rate profiles along x-axis at (0, 0, 5) mm and (0, 0, 35) mm, respectively. Note the top parts of the images in (a) and (b) indicate the boundary between water and tissue at 0 mm.