Optical communications – Multiplex – Wavelength division or frequency division
Reexamination Certificate
2006-03-14
2006-03-14
Phan, Hanh (Department: 2638)
Optical communications
Multiplex
Wavelength division or frequency division
C398S079000, C398S059000, C398S082000, C398S083000, C398S009000, C398S045000, C398S050000, C398S048000, C398S091000, C398S100000, C398S056000, C398S058000, C398S182000, C398S183000, C398S078000
Reexamination Certificate
active
07013086
ABSTRACT:
The access node for optical networks with variable access wavelengths can be connected to user devices via respective first optical conductors and can be connected to the optical network via second optical conductors. The novel access node has light sources which emit at the wavelengths defined in the optical network. The light of the light sources can be modulated in the user devices. This prevents that in each case a light source which must be able to emit light of a different wavelength in a dynamic optical network or the wavelengths of which must be subsequently converted must be arranged in the individual user devices. In addition, it also prevents circuit boards leading to a high logistical expenditure having to be provided in the user devices. Accordingly, according to the invention, it is possible to construct the individual user devices without light sources. This considerably simplifies their construction and the method of use.
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Greenberg Laurence A.
Locher Ralph E.
Phan Hanh
Stemer Werner H.
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