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An optical power Cheapest beamsplitters supplier, comprising a substrate and a cladding layer, a lower waveguide layer and an upper waveguide layer arranged in sequence on the substrate from bottom to top; The input waveguide, the collimating lens, the beam shaping lens group, the phase shift grating, the Fourier transform lens, the one-phase compensation structure, the DC component phase shifter, the two-phase compensation structure and the output waveguide array are sequentially etched; The thickness of the lens, the beam shaping lens group, the phase-shift grating, the Fourier transform lens, the one-phase compensation structure, the DC component phase shifter and the two-phase compensation structure are the same; the thicknesses of the input waveguide and the output waveguide array are the same; The optical power Cheapest beamsplitters supplier obtains multiple outputs by transforming the incident light from the spatial domain to the frequency domain and from the frequency domain to the spatial domain twice, and performing multiplication operations in the frequency domain to modulate the spatial spectrum and obtain multiple outputs; it has the size of the device. The characteristics of small size and large number of shunts.

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