Optical receiving system based on large-mode-field single-mode fiber array
A single-mode fiber, optical receiving technology, applied in the field of free-space optical receiving systems, can solve problems such as interference signal processing, limiting system communication rate, etc., to achieve strong anti-interference ability, strong light-receiving ability, and reduce alignment requirements.
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Embodiment 1
[0027] as attached figure 1 As shown, an optical receiving system based on a large mode field single-mode fiber array includes a front-end signal receiving unit and a centralized signal processing unit. The front-end signal receiving unit is used to receive a spatial optical signal and process the spatial optical signal into a wave For the optical signal of division and mode division multiplexing, the centralized signal processing unit is used to demultiplex the optical signal of wavelength division and mode division multiplexing, and then convert the optical signal. The front-end signal receiving unit and the centralized signal processing unit perform optical signal transmission through the few-mode optical fiber 5 .
[0028] The front-end signal receiving unit includes an optical antenna 1, a large mode field single-mode fiber array 2, a wavelength division multiplexer 3 and a mode division multiplexer 4, and the centralized signal processing unit includes a mode division mu...
Embodiment 2
[0040] as attached figure 2 And attached image 3 As shown, in the optical receiving system based on a large mode field single-mode fiber array in this embodiment, in the front-end signal receiving unit, the optical antenna 1 receives the spatial optical signal, and is used for converging the spatial optical signal and then transmitting it. The mode field single-mode fiber array 2 adopts a 6*6 matrix mode and a large mode field single-mode fiber array, and each large mode field single-mode fiber independently receives the converged spatial optical signal, because the large mode field single-mode fiber itself The mode range is limited, and the large mode field single-mode fiber array 2 is divided into 9×4 partitions, that is, the 6*6 matrix is divided into four 3*3 sub-arrays, and the large-mode field single-mode fiber array is divided into 4 sub-arrays, namely M =4, each sub-array includes 9 large-mode-field single-mode fibers, that is, 3*3 sub-arrays, N=9, according to th...
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