Apparatus for monitoring the operation of an optical repeater
US5162936A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 14, 1991 |
| Grant date | Nov 10, 1992 |
| Priority date | — |
| Expiry date | Feb 14, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2210/074
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Apparatus for monitoring a plurality of optical repeaters of an optical communication system in which each said repeater directly amplifies an optical signal transmitted in an optical fiber and passing through the respective optical repeater, including an optical division circuit for dividing an outgoing main line signal and a monitoring signal, a format conversion circuit by which monitoring information is converted into binary information, a previous modulation circuit by which a monitoring signal is modulated with a sine wave, a comparison circuit which compares the monitoring signal with a reference voltage, a voltage controlled amplifier which amplifies the modulated monitoring signal, an automatic gain control circuit which regulates the output from the outgoing optical repeater, and an outgoing optical repeater which includes a stimulating light source, a wave synthesizer and a doped optical fiber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.