Angled and staggered gratings are used for quasi-phase matching of antisymmetric TM<sub>10</sub> modes in periodically poled lithium niobate waveguides with high efficiency. Control of the symmetry of the nonlinear coefficient d adds a new degree of freedom in the choice of which waveguide modes will interact in a quasi-phase-matched device.
© 2002 Optical Society of America
(070.4340) Fourier optics and signal processing : Nonlinear optical signal processing
(130.2790) Integrated optics : Guided waves
(190.2620) Nonlinear optics : Harmonic generation and mixing
(190.4360) Nonlinear optics : Nonlinear optics, devices
(230.4320) Optical devices : Nonlinear optical devices
J. R. Kurz, X. P. Xie, and M. M. Fejer, "Odd waveguide mode quasi-phase matching with angled and staggered gratings," Opt. Lett. 27, 1445-1447 (2002)