Broadband single-mode operation of standard optical fibers by using a sub-wavelength optical wire filter
Broadband single-mode operation of standard optical fibers by using a sub-wavelength optical wire filter
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DOI：
10.1364/oe.16.014661
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发表时间：
2008-09-15
期刊：
影响因子：
3.8
通讯作者：
Richardson, David J.
中科院分区：
文献类型：
--
作者：
Jung, Yongmin;Brambilla, Gilberto;Richardson, David J.
我们报道了一种具有特殊设计的过渡区的亚波长光缆(SOW)作为一种有效的工具来滤除多模波导中的高阶模式。通过控制跃迁锥形和亚波长光纤的直径，有效地抑制了高阶模的产生。作为一个实际例子，用1微米的SOW演示了标准电信光纤在宽光谱窗口(400类似于1700 nm)上的单模工作。在非常宽的波长范围内获得稳健和稳定的单模工作的能力为光纤设备内的模式控制提供了新的可能性，并且与包括高性能光纤激光器、传感器、光刻和光学相干层析系统在内的一系列应用部门相关。(C)2008年美国光学学会。
We report the use of a sub-wavelength optical wire ( SOW) with a specifically designed transition region as an efficient tool to filter higher-order modes in multimode waveguides. Higher-order modes are effectively suppressed by controlling the transition taper profile and the diameter of the sub-wavelength optical wire. As a practical example, single-mode operation of a standard telecom optical fiber over a broad spectral window ( 400 similar to 1700 nm) was demonstrated with a 1 mu m SOW. The ability to obtain robust and stable single-mode operation over a very broad range of wavelengths offers new possibilities for mode control within fiber devices and is relevant to a range of application sectors including high performance fiber lasers, sensors, photolithography, and optical coherence tomography systems. (C) 2008 Optical Society of America.