Point-by-point inscribed sapphire parallel fiber Bragg gratings in a fully multimode system for multiplexed high-temperature sensing.
Point-by-point inscribed sapphire parallel fiber Bragg gratings in a fully multimode system for multiplexed high-temperature sensing.
复制标题
用于多路复用高温传感的全多模系统中的逐点内接蓝宝石平行光纤布拉格光栅。
DOI：
10.1364/ol.471370
复制
发表时间：
2022-08
期刊：
影响因子：
3.6
通讯作者：
Guannan Shi;Randy C. Shurtz;G. Pickrell;Anbo Wang;Yizheng Zhu
中科院分区：
文献类型：
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作者：
Guannan Shi;Randy C. Shurtz;G. Pickrell;Anbo Wang;Yizheng Zhu
研究了蓝宝石平行光纤布拉格光栅在全多模系统中的逐点写入。平行的FBG被证明是关键，使可检测和可靠的高阶光栅信号。研究了模体积、空间相干性和光栅位置对反射率的影响。在一根蓝宝石光纤中制作了三个级联的七阶pFBG，用于波长复用温度传感。使用低成本、全多模850 nm封装，可实现高达1500°C的可靠测量。
We study the point-by-point inscription of sapphire parallel fiber Bragg gratings (sapphire pFBGs) in a fully multimode system. A parallel FBG is shown to be critical in enabling detectable and reliable high-order grating signals. The impacts of modal volume, spatial coherence, and grating location on reflectivity are examined. Three cascaded seventh-order pFBGs are fabricated in one sapphire fiber for wavelength multiplexed temperature sensing. Using a low-cost, fully multimode 850-nm interrogator, reliable measurement up to 1500°C is demonstrated.