Up-Stream Noise for the Internet Access over Fiber Optical CATV Systems

Hai Han Lu, Chi Sen Lee, Hsien Li Ma, Ching Ting Lee

Research output: Contribution to journalArticlepeer-review


In this study, the properties of the up-stream accumulation noise have been explored by measuring the up-stream carrier-to-noise ratio (CNR) value in the head-end. An experimental two-way CATV network system has been constructed: down-stream bandwidth is 50 ~ 750 MHz, and up-stream bandwidth is 5 ~ 42 MHz. Experimental results have shown that the up-stream accumulation noise is time dependent, resulting in the Internet over fiber optical CATV systems operating unstable. And further, not all up-stream frequencies are available for two-way communication services. The frequency above 25 MHz is more suitable for adding twoway services.

Original languageEnglish
Pages (from-to)111-114
Number of pages4
JournalJournal of Optical Communications
Issue number2
Publication statusPublished - 2003

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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