METHOD FOR DETECTING AND/OR CONTROLLING THE TRANSMISSION WAVELENGTHS OF TRANSMITTING ELEMENTS OF AN OPTICAL WAVELENGTH MULTIPLEX TRANSMISSION UNIT AND A CORRESPONDING WAVELENGTH MULTIPLEX TRANSMISSION UNIT
US6925266B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 25, 1999 |
| Grant date | Aug 2, 2005 |
| Priority date | — |
| Expiry date | Jun 25, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/506
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The invention pertains to a method for determining and/or controlling the transmission wavelengths of transmission elements of an optical wavelength division multiplex transmission unit, in which the output signals of several optical transmission elements (7) with respectively one optical transmission spectrum (15) of different center wavelength (ësj) are respectively fed to one optical input (E2, E4, . . . , En1) of an optical wavelength monitoring and coupling unit (3) that combines the output signals into a wavelength division multiplex signal on one or more optical output(s) (A), with the wavelength monitoring and coupling unit (3) being designed such that an optical path, on which a narrow-band high-pass filtering or low-pass filtering takes place, exists between one, more or all inputs (E2, E4, . . . , En-1), to which the output signal of a transmission element (7) is fed, and one or more additional inputs (E1, E3, . . . , En) that are not connected to transmission elements (7). The filter characteristic on the path is chosen such that the entire spectral power of the signal filtered with the chosen characteristic changes during a shift in the center wavelength of the transmi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.