Article

Repetition Rate Multiplication of Pseudorandom Bit Sequences

Sch. of Electr. & Comput. Eng., Nat. Tech. Univ. of Athens, Athens
IEEE Photonics Technology Letters (Impact Factor: 2.11). 05/2009; 21(7):456 - 458. DOI: 10.1109/LPT.2009.2013330
Source: IEEE Xplore

ABSTRACT

We develop a method for the repetition rate multiplication by a factor of 2 n of pseudorandom bit sequences (PRBSs). It makes recursive use of an optical or-gate in feedback and ensures that the complexity of the resulting circuit is independent of the multiplication factor or the PRBS order to be rate multiplied. We employ an all-optical circuit comprising of two nonlinear fiber Sagnac interferometers and show error-free quadrupling of 12.5-Gb/s PRBSs to 50 Gb/s.

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Available from: Christos Kouloumentas, Jan 27, 2014
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    • "According to the nature of the M-sequence extraction, every proper decimation of an M-sequence is itself an M-sequence [8], therefore the M-sequence PRBS can obtain 2 n times repetition rate multiplication with a T/2 n delay feedback. Previously, Kouloumentas has used the NOLM rings to realize the repetition rate multiplication of PRBS [9], However using NOLM rings entails a too large energy consumption. The power of control light is very high (the power of feedback control light is up to 620 mW in the experiment ) for the small nonlinear coefficient of optical fiber; secondly , it is unfavorable to integrate in the future. "
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