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NOLM-based RZ-DPSK signal regeneration

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6 Author(s)
Striegler, A.G. ; Inst. for Microwave Technol., Univ. of Erlangen-Nuremberg, Erlangen, Germany ; Meissner, M. ; Cvecek, K. ; Sponsel, K.
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We present a nonlinear optical loop mirror (NOLM)-based 2R-regenerator setup, which is capable of regenerating signals modulated in phase-sensitive modulation formats. In a conventional NOLM, fluctuations of the signal amplitude are converted into phase fluctuations. Therefore, it is not suitable for regeneration of signals, modulated in formats such as differential phase-shift keying (DPSK) or duobinary. In this letter, we present a modified NOLM setup for 2R-regeneration taking return-to-zero DPSK as an example.

Published in:

Photonics Technology Letters, IEEE  (Volume:17 ,  Issue: 3 )