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通过熔融拉锥工艺制备熔锥光纤,将两熔锥光纤以一定的方式装配在二维精密微调架上,制备光纤型光可变衰减器。利用光信号在光纤锥形区特有的传输和耦合特性,实现了光纤间的耦合,耦合效率决定了光能量的衰减程度,从而决定了光纤型光可变衰减器的性能。用耦合模理论分析了锥形光纤间的传输和耦合性质,并从实验上给出了两锥形光纤间的耦合与两锥形光纤间的距离的关系,为制备光纤型光可变衰减器提供了理论和实验依据。
The fused taper optical fiber is prepared through a melt taper process, and the two fused taper optical fibers are assembled on a two-dimensional precision trimming frame in a certain way to prepare an optical fiber type optical variable attenuator. The coupling and coupling between optical fibers are realized by using the unique optical transmission and coupling characteristics of the optical signal in the tapered region of the optical fiber. The coupling efficiency determines the attenuation of optical energy, which determines the performance of the optical fiber optical attenuator. Coupling mode theory was used to analyze the transmission and coupling properties between tapered optical fibers. The relationship between the coupling of two tapered optical fibers and the distance between two tapered optical fibers was given experimentally. In order to prepare optical fiber optical variable attenuator Provided theoretical and experimental basis.