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A Fiber-Based All-Optical 3R Regenerator for DPSK Signals

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1 Author(s)
Masayuki Matsumoto ; Graduate Sch. of Eng., Osaka Univ.

Analysis of an all-optical 3R regenerator for differential phase-shift keying (DPSK) signals is presented. Incoming DPSK signals impaired by noise are first demodulated to on-off keying (OOK) signals by a delay interferometer. The amplitude of the OOK signals is then stabilized by a fiber-based all-optical 2R regenerator. In a subsequent nonlinear fiber, locally generated optical clock pulses are phase-modulated by the stabilized OOK pulses and are output as regenerated signals. It is shown that significant phase-noise suppression is achieved by strong amplitude regeneration

Published in:

IEEE Photonics Technology Letters  (Volume:19 ,  Issue: 5 )