Combination of Transverse Mode Selection and Active Longitudinal Mode-Locking of Broad Area Semiconductor Lasers

Figure 6

CCD camera images of the near-field intensity patterns (right) and line scans of these patterns at different filter positions 𝑑. The Gaussian-like fundamental mode number 0 (𝑚=0) and higher order transverse modes up to mode number 𝑚=5 can be selectively excited.