反共振空芯光子晶体光纤与拉锥光纤低损耗耦合

发布时间：2018-04-25 17:34

本文选题：光纤光学 + 空芯光纤　；参考：《激光与光电子学进展》2017年10期

【摘要】：反共振空芯光子晶体光纤(HC-PCF)在中红外光纤气体激光器中具有重要的应用价值,其与实芯光纤的低损耗耦合是实现全光纤结构光纤气体激光器的关键技术。采用将实芯光纤拉锥后插入空芯光纤的方案开展研究。理论和实验结果表明,利用光纤拉锥处理技术改变普通光纤模场直径,可使拉锥光纤与空芯光纤的模场直径近似匹配,从而实现实芯光纤与大模场直径反共振HC-PCF的低损耗耦合。对于模场直径约为35μm的Ice-cream型反共振HC-PCF,仿真结果表明,当锥腰直径为30~50μm时,耦合效率高于95%,最高可达98%,实验测得锥腰直径为35μm时的耦合效率为96.05%。该结论为大模场直径空芯光纤与实芯光纤的低损耗耦合和实现全光纤结构气体激光器的全光纤化提供了一条可行的技术途径。
[Abstract]:Anti-resonance hollow core photonic crystal fiber (HC-PCF) has important application value in medium-infrared fiber gas laser. The low loss coupling between HC-PCF and solid core fiber is the key technology to realize all-fiber structure fiber gas laser. The research was carried out by inserting the solid fiber into the hollow fiber after pulling the cone. The theoretical and experimental results show that the mode field diameter of tapered fiber can be approximately matched with that of hollow fiber by changing the mode field diameter of common fiber by using fiber taper processing technology, thus realizing the low loss coupling of real core fiber and large mode field diameter antiresonant HC-PCF. For Ice-cream type antiresonance HC-PCF whose mode field diameter is about 35 渭 m, the simulation results show that the coupling efficiency is higher than 95 when the cone waist diameter is 30 ~ 50 渭 m, and the maximum is up to 98. The coupling efficiency is 96.05 when the tapered waist diameter is 35 渭 m. This conclusion provides a feasible technical approach for the low loss coupling of large mode field diameter hollow fiber and solid core fiber and the realization of all-fiber all-fiber gas laser with all-fiber structure.
【作者单位】：国防科学技术大学光电科学与工程学院;长春理工大学光电工程学院;
【基金】：国家自然科学基金面上项目(11274385)
【分类号】：TN253

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