Long period fiber grating formed by periodically structured microholes in all-solid photonic bandgap fiber.
Long period fiber grating formed by periodically structured microholes in all-solid photonic bandgap fiber.
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DOI：
10.1364/oe.18.002183
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发表时间：
2010-02
期刊：
影响因子：
3.8
通讯作者：
Minwei Yang;Dong-ning Wang;Ying Wang;C. Liao
中科院分区：
文献类型：
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作者：
Minwei Yang;Dong-ning Wang;Ying Wang;C. Liao
利用飞秒激光脉冲在全固态光子带隙光纤中周期性地打孔，制备了一种新型的长周期光纤光栅。这种结构在波导结构中引入强折射率调制，因此呈现出紧凑的光栅尺寸。模拟和实验结果都证实了纤芯模到LP（11）包层模的光耦合。研究了该器件的折射率传感能力，当折射率从1.30变化到1.35时，谐振波长的位移为23.7nm。获得的平均折射率灵敏度为537 nm/RIU（折射率单位）。
A new type long period fiber grating is fabricated in all-solid photonic bandgap fiber by periodically drilling microholes using femtosecond laser pulse irradiation. Such a structure introduces a strong refractive index modulation in the waveguide structure and hence exhibits a compact grating dimension. Both the simulation and the experimental results confirm the existence of the light coupling from core mode to the LP(11) cladding mode. The refractive index sensing capability of the device has been investigated and the resonant wavelength shift corresponding to the refractive index change from 1.30 to 1.35 is 23.7 nm. The average refractive index sensitivity obtained is 537 nm/RIU (refractive index unit).