高性能价格比的1×7混合棒塑料光纤耦合器的研究

Research of a Cost effective 1×7 Mixing rod Plastic Optical Fiber Coupler

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 。

A high cost effective 1×7 cylindrical mixing rod plastic optical fiber coupler (CMRC) is proposed. Comparing with conventional 1×7 mixing rod plastic optical fiber coupler using tapered mixing rod (TMRC), 1×7 CMRC uses cylindrical POF as mixing rod instead of tapered POF thus eliminate the high demanding POF tapering process and lower the production cost. Experiment measurement of the coupler showing that the crosstalk is lower than -40dB, the coupling efficiency is same as that of 1×7 TMRC and the excess loss can potentially reach 1.7dB.