Optical filtering module and method
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsFrancesco Testa, Fabio Cavaliere, Erin Seder
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Abstract
A method (100) is disclosed for filtering an optical signal to generate at least one electrical output. The method comprises receiving an optical signal (110) and directing at least a part of the optical signal through an n×m array of wavelength selective elements (120), the n×m array comprising n parallel groups, each group comprising m coupled wavelength selective elements. The method further comprises photodetecting an output from each of the n groups of coupled wavelength selective elements (130), and electrically selecting at least one of the photodetected outputs (140). Also disclosed are an optical filtering module (200, 300) a controller (400) for an optical filtering module and a computer program.
Claims20
A method for filtering an optical signal to generate at least one electrical output, the method comprising:
- receiving an optical signal;
- directing at least a part of the optical signal through an n×m array of wavelength selective elements, the n×m array comprising n parallel groups, each group comprising m coupled wavelength selective elements;
- photodetecting an output from each of the n groups of coupled wavelength selective elements;
- and
- electrically selecting at least one of the photodetected outputs.
An optical filtering module for receiving an optical signal and generating at least one electrical output, the optical filtering module comprising:
- a coupler for receiving the optical signal;
- an n×m array of wavelength selective elements, the n×m array comprising n parallel groups, each group comprising m coupled wavelength selective elements;
- a photodetector unit for photodetecting an output from each of the n groups of coupled wavelength selective elements;
- and
- an electrical switch for electrically selecting at least one output of the photodetector unit.
A controller for controlling an optical filtering module, the optical filtering module for receiving an optical signal and generating at least one electrical output, the optical filtering module comprising:
- a coupler for receiving the optical signal;
- an n×m array of wavelength selective elements, the n×m array comprising n parallel groups, each group comprising m coupled wavelength selective elements;
- a photodetector unit for photodetecting an output from each of the n groups of coupled wavelength selective elements;
- and
- an electrical switch for electrically selecting at least one output of the photodetector unit,
- wherein the controller is operable to configure at least one of:
- a selection wavelength of a wavelength selective element;
- or the electrical switch.
Dependencies are inferred from the claim text.