Signal detection method and optical signal receiving system
US8989575B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 29, 2012 |
| Grant date | Mar 24, 2015 |
| Priority date | — |
| Expiry date | Aug 29, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/63
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The present invention provides a signal detection method, including: receiving, by a frequency mixer, wavelength division multiplexing signals and a local oscillator signal, where a wavelength of the local oscillator signal and a wavelength of a target signal in the wavelength division multiplexing signals are the same; a frequency mixer performs interference on the wavelength division multiplexing signals through the local oscillator signal to obtain a coherent signal formed by the local oscillator signal and the target signal; sending the coherent signal to a transimpedance amplifier for amplification to obtain a voltage signal; and obtaining the power of the target signal according to a power amplitude of the voltage signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.