Long-distance transmission of directly modulated 1550 nm AM-VSB CATV systems

Hai Han Lu, Ching Ting Lee, Che Ting Kuo

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


This study presents a directly modulated 1550 nm NTSC AM-VSB 74-channel fiber optical CATV long-distance (over 100km) transmission system. In this system, 1550 nm analog distributed feedback (DFB) laser diodes, push-pull preamplifier, half-split-band, wavelength-division-multiplexing (WDM), and in-line erbium- doped fiber amplifiers (EDFAs) were used. Performances of carrier-to-noise ratio (CNR) of ≥ 49 dB, compositie second order (CSO) of ≥ 70 dB, and composite triple beat (CTB) of ≥ 65 dB were obtained over 100 km of standard single-mode fiber (SMF) transmission. This proposed directly modulated transmission system is simpler and more cost-effective than conventionally externally modulated 1550 nm transmission systems.

Original languageEnglish
Pages (from-to)279-285
Number of pages7
JournalFiber and Integrated Optics
Issue number3
Publication statusPublished - 2001 May

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics


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