Optical processing
First Claim
Patent Images
1. An optical processor, the optical processor comprising:
- a reflective SLM,a dispersion device, anda focusing device disposed between the reflective SLM and the dispersion device,wherein the SLM has a two-dimensional array of controllable phase-modulating elements,wherein the SLM is configured for selection of controllable phase-modulating elements whereby two-dimensional groups of controllable phase-modulating elements are formed at chosen locations of the SLM;
wherein the optical processor is configured such that, using the focusing device, light from the dispersion device is spatially distributed by wavelength across the SLM and within each of the two-dimensional groups, andwherein the optical processor is configured such that the two-dimensional groups of controllable phase-modulating elements display different holograms at the chosen locations of the SLM where said light is incident, for independently processing different wavelengths of said light corresponding to a central wavelength of said light for each of the two-dimensional groups.
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Abstract
A modular routing node includes a single input port and a plurality of output ports. The modular routing node is arranged to produce a plurality of different deflections and uses small adjustments to compensate for wavelength differences and alignment tolerances in an optical system. An optical device is arranged to receive a multiplex of many optical signals at different wavelengths, to separate the optical signals into at least two groups, and to process at least one of the groups adaptively.
198 Citations
40 Claims
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1. An optical processor, the optical processor comprising:
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a reflective SLM, a dispersion device, and a focusing device disposed between the reflective SLM and the dispersion device, wherein the SLM has a two-dimensional array of controllable phase-modulating elements, wherein the SLM is configured for selection of controllable phase-modulating elements whereby two-dimensional groups of controllable phase-modulating elements are formed at chosen locations of the SLM; wherein the optical processor is configured such that, using the focusing device, light from the dispersion device is spatially distributed by wavelength across the SLM and within each of the two-dimensional groups, and wherein the optical processor is configured such that the two-dimensional groups of controllable phase-modulating elements display different holograms at the chosen locations of the SLM where said light is incident, for independently processing different wavelengths of said light corresponding to a central wavelength of said light for each of the two-dimensional groups. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method of operating an optical device, the optical device comprising a reflective SLM having a two-dimensional array of controllable phase-modulating elements, a dispersion device and a focusing device disposed between the reflective SLM and the dispersion device, the method comprising:
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spatially distributing, by wavelength, light having plural wavelengths across the reflective SLM via the dispersion device and the focusing device; assigning groups of individual controllable phase-modulating elements by wavelength, whereby said light is spatially distributed by wavelength within each group and each group has a corresponding central wavelength; selecting, from stored control data, control data for at least some groups of controllable phase-modulating elements; generating, from the respective selected control data, a respective hologram at the at least some groups of controllable phase-modulating elements; and varying the assignment of the groups and the selection of control data whereby upon illumination of said at least some groups by respective light beams at different wavelengths, respective emergent light beams from the groups are controllable independently of each other. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A method of operating an optical device comprising a reflective SLM having a two-dimensional array of controllable phase-modulating elements, a dispersion device and a focusing device disposed between the reflective SLM and the dispersion device, the method comprising:
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spatially distributing, by wavelength, light having plural wavelengths across the reflective SLM via the dispersion device and the focusing device; assigning groups of individual controllable phase-modulating elements by wavelength, whereby said light is spatially distributed by wavelength within each group and each group has a corresponding central wavelength; selecting, from stored control data, control data for each group of controllable phase-modulating elements; generating, from the respective selected control data, a respective hologram at each group of controllable phase-modulating elements; and varying the assignment of the groups whereby upon illumination of said groups by respective light beams at different wavelengths, respective emergent light beams from the groups are controllable independently of each other. - View Dependent Claims (30, 31, 32, 33)
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34. A method of operating an optical device, the optical device comprising a reflective SLM having a two-dimensional array of controllable phase-modulating elements, a dispersion device and a focusing device disposed between the reflective SLM and the dispersion device, the method comprising:
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spatially distributing, by wavelength, light having plural wavelengths across the reflective SLM via the dispersion device and the focusing device; assigning groups of individual controllable phase-modulating elements by wavelengths, whereby said light is spatially distributed by wavelength within each group and each group has a corresponding central wavelength; selecting, from stored control data, control data for at least some groups of controllable phase-modulating elements; generating, from the respective selected control data, a respective hologram at the at least some groups of controllable phase-modulating elements; and varying the selection of control data whereby upon illumination of said groups by respective light beams at different wavelengths, respective emergent light beams from the groups are controllable independently of each other. - View Dependent Claims (35, 36, 37)
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38. A method of training an optical device, the optical device comprising a reflective SLM having a two-dimensional array of controllable phase-modulating elements, a dispersion device and a focusing device disposed between the reflective SLM and the dispersion device, the method comprising:
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spatially distributing, by wavelength, light having plural wavelengths across the reflective SLM via the dispersion device and the focusing device; assigning groups of individual controllable phase-modulating elements by wavelength, whereby said light is spatially distributed by wavelength within each group and each group has a corresponding central wavelength; selecting, from stored control data, control data for each group of controllable phase-modulating elements; generating, from the respective selected control data, a respective hologram at each group of controllable phase-modulating elements; measuring the performance of the device, comparing the measured performance with a desired performance; and
in response thereto, varying the assignment of the groups to improve the measured performance. - View Dependent Claims (39, 40)
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Specification