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All-optical signal reshaping by means of four-wave mixing in optical fibers

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3 Author(s)
Ciaramella, E. ; QPlus Networks Italia, Rome, Italy ; Curti, F. ; Trillo, S.

It is experimentally demonstrated that the four-wave mixing (FWM) effect in an optical fiber can be exploited to achieve all-optical reshaping. The injection of a signal and a strong continuous-wave (CW) pump into a common dispersion-shifted fiber results in several wavelength-converted replicas of the signal. These spectral components exhibit various reshaping behaviors. Selecting low-order FWM waves, we observe a sinusoidal-like transfer function. However, unlike other reshaping devices, a step-like transfer function is obtained for higher order mixing products. A significant noise compression is observed at the converted output, starting from an input noisy nonreturn-to-zero (NRZ) signal stream.

Published in:

Photonics Technology Letters, IEEE  (Volume:13 ,  Issue: 2 )