Apparatus for demultiplexing optical signals at a large number of wavelengths
AssigneeInfineon Technologies AG
InventorJorg-Reinhardt Kropp
Life of this patent
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Abstract
An apparatus for demultiplexing optical signals at a large number of wavelengths using at least one wavelength-selective filter includes at least two wavelength-selective filters in each case for separation of signal components at one wavelength or at two or more wavelengths, located one behind the other in an oblique configuration in the beam path of the apparatus, and disposed such that the signal component that is transmitted by a first filter falls on the subsequent, second filter, the signal component that is reflected by the second filter not being reflected back to the first filter but, instead, running past the first filter, and the signal components that are reflected by the filters are joined together.
Claims22
An apparatus for demultiplexing optical signals at a number of wavelengths, comprising:
- at least first and second wavelength-selective filters for separating components of the optical signals, each of said filters reflecting signal components of at least one wavelength and transmitting signal components of at least one other wavelength, said filters being disposed one behind another in an oblique configuration with respect to an optical beam path and being disposed:
- to allow a signal component transmitted by said first filter to fall on said second filter subsequent to said first filter;
- to not reflect back to said first filter a signal component reflected by said second filter and, instead, to allow the signal component reflected by said second filter to run past said first filter;
- and
- to join together the signal components reflected by said first and second filters.
Dependencies are inferred from the claim text.