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Group Velocity Control of Ultrafast Pulses Based on Electro-Optic Effect and Quadratic Cascading Nonlinearity

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4 Author(s)
Lu, Wenjie ; Dept. of Phys., Shanghai Jiaotong Univ., Shanghai, China ; Yuping Chen ; Chen, Xianfeng ; Xia, Yuxing

In this paper we propose and analyze a method to control the group velocity of an ultrafast pulse based on the electro-optic effect and quadratic cascading nonlinearity. The evolution of the input pulse in a quasi-phase matching (QPM) grating behaves like quadratic slow light solitons, whose group delay can be tuned by changing the applied external electric field along the z-axis of the crystal. Our simulation also shows that an asymmetric QPM domain structure is necessary for the group delay to be tunable by an external electric field. A potential application in dispersion management when constructing a delay line in high-speed system is suggested at the end of discussion.

Published in:

Quantum Electronics, IEEE Journal of  (Volume:46 ,  Issue: 7 )