A low-loss, low-reflection, and stable single-mode multifiber connector design method has been established. The 12 fiber single-mode dry connector exhibited an average connecting loss of 0.17 dB and over 55 dB return loss. The low loss connection is realized by eliminating the plug slipping offset caused by the lateral component of the plug mating force. To realize stable connector performance, the fiber "Direct contract" structure with the fiber protruded connector surface is designed and design parameter is specified. In addition, from the fiber eccentricity distribution function, the connector loss distribution has been estimated analytically
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