The electro-optic effect can be employed to modulate the refractive index of an optical superlattice. In coupled quasi-phase matched processes, this modulation will introduce quasi-phase mismatches and result in energy redistribution among the optical waves. Numerical results indicate that an efficient third harmonic in a periodic or quasi-periodic superlattice can be achieved by varying the external dc electric field. This method provides a simple and convenient way to control the efficiencies of frequency conversion.
© 2005 Optical Society of America
Cheng-Ping Huang, Yue-Hua Wang, and Yong-Yuan Zhu, "Effect of electro-optic modulation on coupled quasi-phase-matched frequency conversion," Appl. Opt. 44, 4980-4984 (2005)