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All-optical processing by fiber delay and four-wave mixing of high-bit-rate nonreturn-to-zero signals for timing extraction by optical injection locking

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4 Author(s)
Bilenca, A. ; Dept. of Electr. Eng., Technion-Israel Inst. of Technol., Haifa, Israel ; Dahan, D. ; Lasri, J. ; Eisenstein, G.

We report an all-optical processing scheme which generates a strong spectral component at the bit rate frequency of a high-speed nonreturn-to-zero data stream. The processed signal can be used for timing extraction by direct optical injection locking. The scheme is based on multiplying the data signal by its delayed replica. A dispersion compensating fiber serves as a delay line and the multiplication is performed by four-wave mixing in a dispersion-shifted fiber. Simulated results and experimental confirmations are demonstrated.

Published in:

Photonics Technology Letters, IEEE  (Volume:14 ,  Issue: 6 )