优化光子带隙光纤与传统单模光纤之间的拼接损耗。

Optimization of the splice loss between photonic-bandgap fibers and conventional single-mode fibers.

机构信息

Edward L. Ginzton Laboratory, Stanford University, 450 Via Palou Mall, Stanford, California 94305, USA.

出版信息

Opt Lett. 2010 Jun 15;35(12):1938-40. doi: 10.1364/OL.35.001938.

DOI:10.1364/OL.35.001938

PMID:20548345

Abstract

To understand the loss limitations of a splice between a hollow-core fiber and a conventional fiber, we use a numerical model to calculate the expected coupling loss between the NKT Photonics' HC-1550-02 fiber and a single-mode fiber (SMF) of arbitrary step-index profile. When the SMF parameters are optimized, the splice loss is predicted to be as low as approximately 0.6 dB. This minimum is believed to be largely due to mode-shape mismatch. These predictions are confirmed experimentally by optimizing the splice loss between this photonic-bandgap fiber and five SMFs with different mode-field diameters (MFDs) and V numbers. With the SMF-28 fiber, the measured loss is 1.3 dB, in excellent agreement with theory. Using a SMF with parameters close to the optimum values (MFD=7.2 microm and V=2.16), this loss was reduced to a new record value of 0.79 dB.

摘要

为了理解空心光纤和常规光纤之间的拼接损耗限制，我们使用数值模型来计算 NKT Photonics 的 HC-1550-02 光纤与任意阶跃折射率剖面的单模光纤 (SMF) 之间的预期耦合损耗。当优化 SMF 参数时，预计拼接损耗低至约 0.6 dB。据信，这种最小值主要是由于模式形状不匹配造成的。通过优化这种带隙光子光纤与具有不同模场直径 (MFD) 和 V 数的五根 SMF 之间的拼接损耗，实验证实了这些预测。对于 SMF-28 光纤，测量损耗为 1.3 dB，与理论值非常吻合。使用参数接近最佳值 (MFD=7.2 µm 和 V=2.16) 的 SMF，将损耗降低到了 0.79 dB 的新记录值。