Structural microfiber long-period gratings.
Structural microfiber long-period gratings.
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DOI：
10.1364/oe.20.018079
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发表时间：
2012-07
期刊：
影响因子：
3.8
通讯作者：
Lipeng Sun;Jie Li;Long Jin;B. Guan
中科院分区：
文献类型：
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作者：
Lipeng Sun;Jie Li;Long Jin;B. Guan
我们实验证明了一种新的结构的长周期光栅螺旋盘绕一个微光纤到另一个相对较厚的直径。由于螺旋微纤对直微纤的倏逝场具有很强的周期调制作用，在长度约450 μm的紧凑型器件中（4个螺旋周期），可以诱导出约16.2dB的谐振传输陷波。此外，来自直光纤的过滤后的光能可以再次出现在盘绕光纤的输出端，从而在产生新的设备功能方面提供了极大的灵活性。研究了应变对光谱响应的影响，并讨论了106 nm左右的宽波长调谐范围。
We experimentally demonstrate a novel structural long-period grating by helically coiling one microfiber onto another with the relatively thicker diameter. Owing to the strong periodic modulation of the coiled microfiber to the evanescent field of the straight microfiber, a resonance transmission notch of ~16.2 dB can be induced for a compact device length of ~450 μm only (4 helical periods). Moreover, the filtered light energy from the straight fiber can emerge again at the output of the coiled one, providing great flexibility in producing new device functions. The spectral response to external strain is investigated and wide wavelength tuning range of around 106 nm is discussed.