Clock Recovery in Coherent Optical Receivers

Conference: Photonische Netze - 12. ITG-Fachtagung
05/02/2011 - 05/03/2011 at Leipzig, Germany

Proceedings: Photonische Netze

Pages: 4Language: englishTyp: PDF

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Stojanovic, Nebojsa; Hauske, Fabian N.; Xie, Changsong; Chen, Ming (Huawei Technologies Duesseldorf GmbH, European Research Center, Riesstrasse 25, 80992 Munich, Germany)

Standard clock recovery schemes with timing phase estimation before or after the 2x2 MIMO FIR filter in digital coherent receivers are analyzed. In particular, the influence of first-order PMD combined with certain SOPs to the timing estimation is investigated. No scheme has been identified to prove robust timing estimation for all channel conditions.