Title :
Raman Crosstalk Suppression in CATV Overlay Passive Optical Network
Author :
Kim, Hoon ; Jun, Sang Bae ; Chung, Yun C.
Author_Institution :
Telecommun. R&D Center, Samsung Electron. Co, Kyunggi-Do
fDate :
5/1/2007 12:00:00 AM
Abstract :
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
Keywords :
cable television; optical crosstalk; optical fibre networks; optical fibre polarisation; optical transmitters; stimulated Raman scattering; CATV overlay network; CATV signal; Raman crosstalk suppression; SRS-induced crosstalk; crosstalk components; downstream baseband signal; high-speed polarization scrambler; low-number CATV channels; optical transmitter; passive optical network; stimulated Raman scattering; subtractor module; Baseband; Degradation; High speed optical techniques; Optical crosstalk; Optical fiber polarization; Optical receivers; Optical transmitters; Passive optical networks; Raman scattering; Signal processing; Cable television (CATV); crosstalk; fiber nonlinearity; passive optical network (PON); stimulated Raman scattering; wavelength-division multiplexer;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2007.895055
