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

Volume

19

Issue

9

fYear

2007

fDate

5/1/2007 12:00:00 AM

Firstpage

695

Lastpage

697

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;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2007.895055

Filename

4147627