Patent · US Expired

Optical transmission equipment which transmits an amplified optical data signal and an optical surveillance signal

US6266169A · kind A · utility

14Cited by
20References
4Claims
0Family size

Assignee

Inventors

Key dates

Filing dateOct 1, 1999
Grant dateJul 24, 2001
Priority date
Expiry dateOct 1, 2019

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH04J14/0279
  • WIPO fieldTelecommunications
  • WIPO sectorElectrical engineering

Abstract

An optical transmission system accomplishes optical transmission over a long distance by combining a multiplexing line terminal with optical amplifiers, linear repeaters, and regenerators with optical amplifiers combined together. The system also accomplishes the optical transmission over a short distance by directly connecting the linear terminals therebetween, with an electric-to-optic converter replaced by an electric-to-optic converter having a semiconductor amplifier, with an optic-to-electric converter by an optic-to-electric converter having an avalanche photodiode as light receiver, and with no use of any optical booster amplifier and optical preamplifier in the multiplexing line terminal. With these, the optical transmission system can be easily constructed depending on the transmission distance required.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.