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All-optical switching in phase-shifted fiber Bragg grating

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3 Author(s)
Melloni, A. ; Dipt. di Elettronica e Inf., Politecnico di Milano, Italy ; Chinello, M. ; Martinelli, M.

A low-power all-optical-switching in a phase-shifted grating has been experimentally demonstrated at 1.55 μm. The grating is written in a standard fiber for communication and the switching is based on the cross-phase modulation induced by an intense pump pulse on a low intensity probe. An extinction ratio of more than 6 dB has been achieved for 1 kW pulse peak power. The strong enhancement of the nonlinear effect due to the group velocity reduction and the switching polarization dependence have been theoretically investigated and experimentally confirmed.

Published in:

Photonics Technology Letters, IEEE  (Volume:12 ,  Issue: 1 )