通訊用轉動連結之光源與光纖耦合理論與機制分析

本論文探討旋轉連結器應用光纖通訊之耦合機制，同時進行光纖旋轉連結器之專利分析，並以微光學結構作為論文中所分析的模型，此模型係利用四組漸變式折射率透鏡達到雙通道之光纖傳輸。因此，研究中分別對單通道與雙通道系統做分析，更提出了不同的結構設計並詳加討論。　　而針對理論分析，將使用了CodeV調整漸變式折射率透鏡之對位偏差，包含了角度偏差、側部偏差及間隔偏差，以探討功率變動情況，由模擬結果可得知一通道關鍵影響因子為角度偏差，另一通道則為側部偏差及間隔偏差，再利用自動化量測平台與膠合系統以完成模擬分析結果之驗證。並在膠合系統製作光準直器之過程中，可發現膠合光纖之位置不僅會影響光耦合效率更會導致在一個旋轉週期中有兩個相對高的光功率點產生。因此，透過本研究之數據及設計的評估，能有效地分析雙通道旋轉連結器，並結合模擬與實驗結果將可實現光纖旋轉連結器之開發。

關鍵字

光纖滑環；漸變式折射率透鏡；膠合；光纖耦合效率

並列摘要

This work investigated the coupling mechanism of rotational joint that was used for optical fiber communication. Following a previous design of the rotational fiber joint, the micro structure with four graded-index lens (GRIN lens) was used as the analysis model in this study. The four GRIN lens architecture can be used to achieve the two-channel fiber communication. As a consequence, this work analyzed single-channel and two-channel systems theoretically and experimentally. At the end, a different optical architecture was proposed and discussed. In theoretical, Code V was used to calculate different mis-alignment losses of the rotational fiber joint. In detail, the mis-alignment can be categorized as lateral offset, separation, and angular tilt. Based on this simulation, the critical factor of different configurations were analyzed. For the single channel system, the angular tilt is the critical factor. For the two channel system, on the other hand, the lateral offset and separation are the critical factors. Moreover, a glued system and automatic measurement system were implemented to verify the simulation result. The position of glued fiber not only affected the coupling efficiency but also lead a two-peak power response in one rotation cycle. In summary, this work developed an effective assessment to analyze the two-channel rotational joint. In addition, it integrated both theoretical simulation and experimental analysis to realize a novel approach to design rotational fiber joint.

並列關鍵字

Fiber optic slip ring ； Graded-index lens ； Glue ； Optical fiber efficiency

參考文獻

[1] A. Sano, H. Masuda, T. Kobayashi, M. Fujiwara, K. Horikoshi, E. Yoshida,

[16] Donald J. Sterling, Technician's Guide To Fiber Optics, Third ed.: Thomson, 2003.

[24] D. G. Jia, W. C. Jing, Y. M. Zhang, G. H. Wang, F. Tang, and J. Zhang, "Bidirectional dynamic data transmission through a rotary interface," Optical Engineering, vol. 44, 050503-1 – 050503-2, May 2005.

Y. Miyamoto, M. Matsui, M. Mizoguchi, H. Yamazaki, Y. Sakamaki, and H. Ishii, "69.1-Tb/s(432 x 171-Gb/s) C-and extended L-band transmission over 240 km using PDM-16-QAM modulation and digital coherenet detection," proc. OFC, PDPB7, 2010.

[6] J. C. Palais, "Fiber Coupling Using Graded-Index Rod Lenses," Applied Optics, vol. 19, pp. 2011-2018, 1980.

國際替代計量

通訊用轉動連結之光源與光纖耦合理論與機制分析

全文下載

主題瀏覽