Zhang Xiaolei, Zhang Xingyu, Wang Qingpu, Chang Jun, Peng Gang-Ding
School of Information Science & Engineering, Shandong University, Jinan, 250100, China.
J Opt Soc Am A Opt Image Sci Vis. 2011 May 1;28(5):924-33. doi: 10.1364/JOSAA.28.000924.
We propose an all-fiber-optic supermode selection scheme based on large-mode-area single-mode fiber for multicore fiber (MCF). The supermode selection in terms of the coupling coefficient is investigated and compared for various ring-type and concentric-type MCFs. The in-phase supermode is found to have a significantly higher coupling coefficient than other supermodes--demonstrating significant and desirable supermode selection characteristics. This scheme has shown better in-phase supermode selection performance than the conventional free-space Talbot cavity. It is found to be effective in selecting the in-phase supermode for both ring-type and concentric-type MCFs and promising for all-fiber MCF lasers with high power output and good beam quality.
我们提出了一种基于大模场面积单模光纤的用于多芯光纤（MCF）的全光纤超模选择方案。针对各种环形和同心型多芯光纤，研究并比较了基于耦合系数的超模选择情况。发现同相超模的耦合系数明显高于其他超模，展现出显著且理想的超模选择特性。该方案比传统的自由空间塔尔博特腔具有更好的同相超模选择性能。结果表明，它对于环形和同心型多芯光纤选择同相超模均有效，对于输出高功率且光束质量良好的全光纤多芯光纤激光器具有很大潜力。
