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提出了使用圆柱形混合棒的 1× 7塑料光纤耦合器 ,它直接使用粗塑料光纤制作混合棒 ,省略了加工难度大、成本高的混合棒拉锥过程 ,因而生产成本较低 ,但也带来了结构性的通道串音。研究了混合棒失配面外接U形光纤光吸收器以降低结构性通道串音的方法 ,制作了实验样品并进行了性能测量。测量结果表明 ,该耦合器的通道串音 <- 4 0dB ,其耦合效率与 1× 7圆锥形混合棒塑料光纤耦合器相同 ,附加损耗可以降至 1.7dB以下 ,该耦合器是一种高性能价格比的塑料光纤耦合器
A 1 × 7 plastic optical fiber coupler using a cylindrical hybrid rod is proposed. The hybrid optical fiber coupler directly uses a coarse plastic optical fiber to make a hybrid rod, which omits the process of mixing and pulling the tapered rod, which is difficult and costly to produce. Therefore, the production cost is lower, Came the structural channel crosstalk. The method of reducing the crosstalk of the structural channel by mixing U-shaped optical fiber absorber with mismatched facets was studied. The experimental samples were fabricated and their performances were measured. The measurement results show that the coupler crosstalk <- 4 0dB, the coupling efficiency and 1 × 7 conical hybrid plastic optical fiber coupler the same, the additional loss can be reduced to 1.7dB or less, the coupler is a high performance The price ratio of plastic fiber coupler