研究了熔融拉锥光纤型波分复用器制备过程中各相关参量对其最小信道间隔的影响。并根据理论模拟的结论设计了新型的熔融拉锥装置,其中加热装置为有较长均匀加热区域的条形加热炉,使熔融拉锥光纤型波分复用器的耦合长度显著加长,改善了传统拉锥方法对这一类型波分复用器可达到的最小信道间隔的限制,得到了初步实验结果,最小信道间隔达到3.01 nm。

The influences of correlative parameters in the process of fabricating fused biconical taper fiber wavelength division multiplexer on the minimum channel spacing are studied, and an improved device for fused biconical taper is designed according to the conclusion obtained by numerical simulation, which has an electric strip heater with long uniform heating area as the heating unit. The coupling length is lengthened obviously by using the improved device, and the limitation of conventional drawing method to the reachable minimum channel spacing of fused biconical taper fiber wavelength division multiplexer is broken. A preliminary experiment result shows that the minimum channel spacing reaches 3.01 nm.