| 摘要 |
<p>A mode selection technique in a laser is proposed wherein a recess is formed in a surface of a waveguide in the laser. The recess provides a region of free space propagation within the waveguide which preferentially selects the lowest order mode. A mode selective RF excited CO 2 slab laser, having a stable resonator in the waveguide dimension and a negative branch unstable resonator in the non-waveguide dimension, is provided and the position and size of the recess is considered to provide low order mode selection.</p> |
