一种用于空间通信的新型光纤耦合结构设计
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摘要
在空间通信中,空间光到单模光纤的耦合效率直接决定了数据传输质量及稳定性,为了提高光纤耦合效率,设计了一种新型光纤耦合结构。该结构由光学整形透镜组与球面光纤头组成,整形透镜组通过调节D/f实现了聚焦位置与光纤头的最优匹配,球面光纤头提高了光纤端面数值孔径及偏移量容错能力。对D/f、ξ及dr的仿真计算可知,D/f的选定对系统耦合效率影响明显,当D/f在(0,0. 5)区间内时,偏移量对耦合效率影响最小;当dr=1. 5时,耦合效率为60. 3%,达到最大值。采用新型光纤耦合结构的最大耦合效率可达60. 3%,优于相同条件下传统耦合结构的最大耦合效率36. 7%。由此可见,该新型光纤耦合结构可以应用于空间通信中空间光到单模光纤的耦合,具有更好的耦合效率及抗干扰能力。
In space communication,data transmission quality and stability are determined by coupling efficiency of spatial light to single mode fiber. In order to improve the coupling efficiency of fiber,a novel fiber coupling structure is designed. The structure consists of optical shaping lens group and the spherical fiber probe. It achieves an optimal match between the focus position and the fiber tip using adjusting D/f by shaping lens group; It improves the numerical aperture and offset tolerance of the fiber end face by the spherical fiber probe. The simulation calculations of D/f,ξand drshow that the selection of D/f has a significant influence on the coupling efficiency of the system. When D/f is in the( 0,0. 5) interval,the offset has the least influence on the coupling efficiency; When dr= 1. 5,the coupling efficiency is 60. 3%,reaching a maximum value. The maximum coupling efficiency of the novel fiber coupling structure is up to 60. 3%,which is better than the maximum coupling efficiency of the traditional coupling structure under the same conditions,which is just 36. 7%.It can be seen that the novel fiber coupling structure can be applied to the coupling of spatial light to single mode fiber.
In space communication,data transmission quality and stability are determined by coupling efficiency of spatial light to single mode fiber. In order to improve the coupling efficiency of fiber,a novel fiber coupling structure is designed. The structure consists of optical shaping lens group and the spherical fiber probe. It achieves an optimal match between the focus position and the fiber tip using adjusting D/f by shaping lens group; It improves the numerical aperture and offset tolerance of the fiber end face by the spherical fiber probe. The simulation calculations of D/f,ξand drshow that the selection of D/f has a significant influence on the coupling efficiency of the system. When D/f is in the( 0,0. 5) interval,the offset has the least influence on the coupling efficiency; When dr= 1. 5,the coupling efficiency is 60. 3%,reaching a maximum value. The maximum coupling efficiency of the novel fiber coupling structure is up to 60. 3%,which is better than the maximum coupling efficiency of the traditional coupling structure under the same conditions,which is just 36. 7%.It can be seen that the novel fiber coupling structure can be applied to the coupling of spatial light to single mode fiber.
引文
[1] T. Weyrauch. Experimental demonstration of coherent beam combining over a 7 km propagation path[J]. Opt. Lett.,2011,36(22):4455-4457.
[2]徐春凤,倪小龙,刘智.激光大气湍流传输中的光强闪烁特性[J].光学精密工程,2016,24(10):183-189.
[3]吴从均,颜昌翔,高志良.空间激光通信发展概述[J].中国光学,2013,6(5):670-680.
[4]黄冠,耿超,李枫,李新阳.基于FPGA硬件控制平台的单模光纤自适应耦合技术[J].中国激光,2017,44(4):406001-1.
[5]高建秋,孙建锋,李佳蔚,等.基于激光章动的空间光到单模光纤的耦合方法[J].中国激光,2016,43(8):25-32.
[6] Y. Dikmelik,F. Davidson. Fiber-coupling efficiency for freespace optical communication through atmospheric turbulence[J].Applied Optics,2005,44(23):4946-4952.
[7] M. Toyoshima. Maximum fiber coupling efficiency and optimum beam size in the presence of random angular jitter for free-space laser systems and their applications[J]. Journal of the Optical Society of America A:Optics Image Science&Vision,2006,23(9):2246-2250.
[8] CHEN C Y,YANG H M,WANG H,et al. Coupling plane wave received by an annular aperture into a single-mode fiber in the presence of atmospheric turbulence[J]. Applied Optics,2011,50(3):307-312.
[9] CHEN C Y,YANG H M. Characterizing the radial content of orbital-angular-momentum photonic states impaired by weak-tostrong atmospheric turbulence[J]. Optics Express,2016,24(17):19713-19727.
[10] H. Takenaka,M. Toyoshima,Y. Takayama. Experimental verification of fiber-coupling efficiency for satellite-toground atmospheric laser downlinks[J] Optics Express,2012,20(14):15301-15308.
[11]郑晶晶,郑凯,彭健,等.单芯光纤与双芯光纤的对接和熔接耦合效率分析[J].光学学报,2010,30(9):2529-2535.
[12]罗文,耿超,李新阳.大气湍流像差对单模光纤耦合效率的影响分析及实验研究[J].光学学报,2014,34(6):0606001.
[13] LI F,CHAO G,LI X,et al. Co-Aperture Transceiving of Two Combined Beams Based on Adaptive Fiber Coupling Control[J]. IEEE PHOTONICS TECHNOLOGY LETTERS,2015,27(17):1787-1790.
[2]徐春凤,倪小龙,刘智.激光大气湍流传输中的光强闪烁特性[J].光学精密工程,2016,24(10):183-189.
[3]吴从均,颜昌翔,高志良.空间激光通信发展概述[J].中国光学,2013,6(5):670-680.
[4]黄冠,耿超,李枫,李新阳.基于FPGA硬件控制平台的单模光纤自适应耦合技术[J].中国激光,2017,44(4):406001-1.
[5]高建秋,孙建锋,李佳蔚,等.基于激光章动的空间光到单模光纤的耦合方法[J].中国激光,2016,43(8):25-32.
[6] Y. Dikmelik,F. Davidson. Fiber-coupling efficiency for freespace optical communication through atmospheric turbulence[J].Applied Optics,2005,44(23):4946-4952.
[7] M. Toyoshima. Maximum fiber coupling efficiency and optimum beam size in the presence of random angular jitter for free-space laser systems and their applications[J]. Journal of the Optical Society of America A:Optics Image Science&Vision,2006,23(9):2246-2250.
[8] CHEN C Y,YANG H M,WANG H,et al. Coupling plane wave received by an annular aperture into a single-mode fiber in the presence of atmospheric turbulence[J]. Applied Optics,2011,50(3):307-312.
[9] CHEN C Y,YANG H M. Characterizing the radial content of orbital-angular-momentum photonic states impaired by weak-tostrong atmospheric turbulence[J]. Optics Express,2016,24(17):19713-19727.
[10] H. Takenaka,M. Toyoshima,Y. Takayama. Experimental verification of fiber-coupling efficiency for satellite-toground atmospheric laser downlinks[J] Optics Express,2012,20(14):15301-15308.
[11]郑晶晶,郑凯,彭健,等.单芯光纤与双芯光纤的对接和熔接耦合效率分析[J].光学学报,2010,30(9):2529-2535.
[12]罗文,耿超,李新阳.大气湍流像差对单模光纤耦合效率的影响分析及实验研究[J].光学学报,2014,34(6):0606001.
[13] LI F,CHAO G,LI X,et al. Co-Aperture Transceiving of Two Combined Beams Based on Adaptive Fiber Coupling Control[J]. IEEE PHOTONICS TECHNOLOGY LETTERS,2015,27(17):1787-1790.