A multi-wavelength space light field differential operation device based on a diffraction grating
A diffraction grating and spatial light field technology, applied in digital differential analyzers, complex mathematical operations, calculations using non-numerical representations, etc., can solve problems such as a single wavelength, achieve small device size, improve information processing capacity, and structure simple effect design
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Embodiment 1
[0028] As shown in Fig. 1(a), it is an embodiment of a reflective multi-wavelength spatial light field differential operation device based on a diffraction grating, which includes sequentially stacked from top to bottom: a spatial frequency coupling layer, a waveguide layer, and a reflective layer. The spatial frequency coupling layer uses a diffraction grating. The input coherent light is input to the multi-wavelength spatial light field differentiator from the side of the spatial frequency coupling layer in the air, and after the phase matching of the diffraction grating excites the waveguide mode in the dielectric waveguide layer, it is output to a certain non-zero order diffraction of the diffraction grating . The input and output are on the same side of the device and are reflective devices.
[0029] Such as figure 2As shown, the spatial frequency coupling layer of the multi-wavelength spatial light field differential operation device uses a diffraction grating. The mat...
Embodiment 2
[0035] As shown in Figure 1(b), it is an embodiment of a transmissive multi-wavelength spatial light field differential operation device based on a diffraction grating, including sequentially stacked from top to bottom: input side spatial frequency coupling layer, waveguide layer, output Side spatial frequency coupling layer. The input side spatial frequency coupling layer uses a prism, and the output side spatial frequency coupling layer uses a diffraction grating. The input coherent light is coupled into the multi-wavelength spatial light field differentiator from the air through a prism, and after the phase matching of the prism excites the waveguide mode in the dielectric waveguide layer, it is output to a certain non-zero order diffraction of the diffraction grating. The input and output are located on different sides of the device, which is a transmissive device.
Embodiment 3
[0037] As shown in Figure 1(c), it is an embodiment of a transmissive multi-wavelength spatial light field differential operation device based on a diffraction grating, including sequentially stacked from top to bottom: input side spatial frequency coupling layer, waveguide layer, output Side spatial frequency coupling layer. The input-side spatial frequency coupling layer and the output-side spatial frequency coupling layer use diffraction gratings with different periods. The input coherent light is coupled from the air to the multi-wavelength spatial light field differentiator through the diffraction grating, and after the phase matching of the diffraction grating excites the waveguide mode in the dielectric waveguide layer, it is output to a certain non-zero order diffraction of the output side diffraction grating. The input and output are located on different sides of the device, which is a transmissive device.
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