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Characterization of notched long-period fiber gratings: effects of periods, cladding thicknesses, and etching depths

机译：有缺口的长周期光纤光栅的特征：周期，包层厚度和蚀刻深度的影响

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摘要

This study proposes using an inductively coupled plasma etching process to fabricate notched long-period fiber grating (NLPFG) for sensor applications. The effects of the designed parameters (i.e., different fiber cladding thicknesses, grating periods, and etching depths) are studied to explore the characterization of NLPFG. The characterization as indicated by tests of the NLPF showed that the wavelength of NLPFG produced a redshift with decreases in cladding thickness. The drift rate of the wavelength following changes in thickness was -2.801 nm/μm. In addition, a redshift also was exhibited in the increased period, with a wavelength drift rate corresponding to the size of the period of 1.466 nm/μm. Moreover, the results showed that the transmission loss in the spectra increased with etching depth. The variation rate of transmission loss based on etching depth was -0.458 dB/μm.
机译：这项研究提出使用感应耦合等离子体蚀刻工艺来制造用于传感器应用的带槽口长周期光纤光栅（NLPFG）。研究了设计参数的影响（即不同的光纤包层厚度，光栅周期和蚀刻深度），以探索NLPFG的特性。 NLPF测试表明，NLPFG的波长产生红移，包层厚度减小。厚度变化后的波长漂移率为-2.801nm /μm。另外，在增加的周期中还表现出红移，波长漂移率对应于周期的大小为1.466nm /μm。此外，结果表明，光谱的透射损耗随着蚀刻深度的增加而增加。基于蚀刻深度的传输损耗的变化率为-0.458dB /μm。

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