Figure 2. Simulation results showing the generation and amplification of OAM lasers.

Blue refers to the amplification of a Gaussian seed by a Gaussian pump. The initial laser configuration in each panel (a–c) corresponds to the initial set-up illustrated by each corresponding panel (a–c) in Fig. 1. (a) The amplification of a seed with using a long Gaussian pump (red). (b) The generation and amplification of a new OAM mode with (dashed red) and of an existing mode with (solid red) from an OAM pump polarized in two directions with and . (c) The amplification of a new OAM mode with from a TEM seed with no net initial OAM and from a Gaussian pump. See Table 1 for simulation parameters.