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All-Optical Tunable Delay With NRZ-to-RZ Format Conversion Capability Based on Optical Kerr Switch and Pulse Pre-Chirping

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3 Author(s)
Kuo, B.P.-P. ; Dept. of Electr. & Electron. Eng., Univ. of Hong Kong, Hong Kong, China ; Chui, P.C. ; Wong, Kenneth Kin-Yip

All-optical tunable delay plays an important role for enabling high-throughput optical routing, such as buffer for contention resolution and timing synchronization. We proposed and demonstrated a widely tunable optical delay using optical Kerr-switch-based wavelength converter and pulse pre-chirping for compensating chromatic dispersion in fiber delay. With wideband operation provided by a Kerr-switch wavelength converter, a tunable delay range up to 8.56 ns was achieved. Meanwhile, pulse pre-chirping helped to alleviate group-velocity dispersion (GVD)-induced penalty, and provided simultaneous nonreturn-zero (NRZ)-to-RZ format conversion functionality.

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Lightwave Technology, Journal of  (Volume:26 ,  Issue: 23 )