Low-cost RF photonics [for HFC CATV systems]

Author

Woodward, S. ; Gnanck, A.

Author_Institution

AT&T Labs.-Res., Red Bank, NJ, USA

fYear

1999

fDate

26-27 July 1999

Abstract

CATV systems have evolved from coaxial architectures providing approximately fifty AM-VSB television channels to two-way hybrid-fiber coax (HFC) communication systems providing over 100 channels of video (both analog and digital) as well as data and telephony. It is well-known that transmitting large numbers of analog channels requires high performance optical links. The National Association of Broadcasters requires a carrier-to-noise ratio (CNR) of 46 dB on standard NTSC video channels. The requirements for transmission of digital signals on analog subcarriers are considerably relaxed. To achieve a bit-error-rate of 10/sup -9/ 64-QAM requires a CNR of only 30 dB; if QPSK is used than the required CNR is only 16 dB. These relaxed requirements open the possibility of using lower-cost optical components.

Keywords

cable television; forward error correction; hybrid fibre coax networks; laser noise; optical communication equipment; optical fibre subscriber loops; CNR; Fabry-Perot lasers; HFC CATV systems; forward error correction; high performance optical links; laser noise; low-cost RF photonics; low-cost optical components; sporadic intensity noise; uncooled lasers; Coaxial components; Digital video broadcasting; Hybrid fiber coaxial cables; Optical devices; Optical fiber communication; Photonics; Quadrature phase shift keying; Radio frequency; TV broadcasting; Telephony;

fLanguage

English

Publisher

ieee

Conference_Titel

Nanostructures and Quantum Dots/WDM Components/VCSELs and Microcavaties/RF Photonics for CATV and HFC Systems, 1999 Digest of the LEOS Summer Topical Meetings

Conference_Location

San Diego, CA, USA

Print_ISBN

0-7803-5633-0

Type

conf

DOI

10.1109/LEOSST.1999.794730

Filename

794730