Phase locking of linear arrays of CO2 waveguide lasers by the waveguide-confined Talbot effect

Abstract

Phase locking of CO2 waveguide laser arrays of up to 19 channels has been attained by low-loss coupling in a slab waveguide of Talbot imaging dimensions, within a two-mirror cavity. The technique provides strong channel coupling while maintaining a low laser threshold. A seven channel array phase locked into a single mode by this technique has produced 100 W of output and 10% efficiency, demonstrating the effectiveness of Talbot imaging, when combined with confinement in a slab waveguide.

Programmable electron density patterns induced by the interaction of an array laser and underdense plasma

“…In this paper, we analytically demonstrate a scheme for generating two-and three-dimensional programmable electron density patterns through an array laser-plasma interaction in a uniform and cold plasma. Further, the analytical solutions are confirmed by particle-in-cell (PIC) simulations with the software VSim [39]. The application of array laser beams in laser-plasma interactions is of practical importance and necessity, which will result in the generation of spatially modulated plasma structures.…”

Output mode characteristics of an in-phase locked gain waveguide array CO 2 laser

“…The relationship between the beam radius of a Gaussian beam and the waveguide transverse size can be determined by the following equations: [12] w 0 = 0.7032a, (square), w 0 = 0.6435a, (round).…”

“…In this paper, based on Hall's waveguide array laser structure, [12] the sliced waveguide array laser is proposed; the experimental results of the optical oscillation mode frequency, the far-field intensity distribution and the burnt pattern of the sliced waveguide array laser are obtained. To explain the experimental results, a revised mode expression based on the Gaussian mode [13−15] and the normal mode [13] of the rectangle waveguide is proposed, and it is shown that the theoretical simulation results based on the revised mode expression are in good agreement with the experimental results.…”