Simultaneous collinear and non-collinear parametric generation in 1D single grating periodically poled lithium tantalate

Experimental study of multiwavelength parametric generation in a two-dimensional periodically poled lithium tantalate crystal

“…On the other hand, 2D NLPC provide greater flexibility to QPM compared to 1D periodically poled nonlinear crystals. This is because they contain more lattice vectors [6,7]. Furthermore, Liu and Kung [8] reported, by a numerical study, that a gain enhancement can be reached through the contribution of multiple lattice vectors to phase-match the same nonlinear process.…”