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Raman Crosstalk Suppression in CATV Overlay Passive Optical Network

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3 Author(s)
Hoon Kim ; Telecommun. R&D Center, Samsung Electron. Co, Kyunggi-Do ; Sang Bae Jun ; Yun C. Chung

In cable television (CATV) overlay passive optical networks (PONs), where a CATV signal copropagates with a downstream baseband signal, the crosstalk components mediated by stimulated Raman scattering (SRS) limit the performance of low-number CATV channels. In this letter, we propose and demonstrate a way of reducing the SRS-induced crosstalk in CATV overlay PONs. The proposed scheme utilizes a high-speed polarization scrambler in the transmitter to make the SRS-induced crosstalk independent of polarization evolution along the fiber and a subtractor module to compensate for the crosstalk. Our demonstration shows that crosstalk can be reduced by 9 dB

Published in:

IEEE Photonics Technology Letters  (Volume:19 ,  Issue: 9 )