Basic study of temperature independent fiber bending sensor for catheters using multicore fiber Bragg grating and two-photon absorption process in Si-APD
Basic study of temperature independent fiber bending sensor for catheters using multicore fiber Bragg grating and two-photon absorption process in Si-APD
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DOI：
10.1117/12.2603933
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发表时间：
2021-11
期刊：
影响因子：
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通讯作者：
Zhao Shihua;Naohiro Sonoda;Rei Takagi;Itsuki Saito;Tetsuya Abe;T. Wakayama;Yosuke Tanaka
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文献类型：
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作者：
Zhao Shihua;Naohiro Sonoda;Rei Takagi;Itsuki Saito;Tetsuya Abe;T. Wakayama;Yosuke Tanaka
我们提出了一种用于导管的与温度无关的光纤弯曲传感器，该传感器使用多芯光纤，每个芯中刻有布拉格光栅，并且基于硅雪崩光电二极管中的双光子吸收过程的光信号的强度相关性的光谱测量技术。虽然光纤布拉格光栅通常对温度变化敏感，但通过处理所有布拉格光栅反射光的光谱数据可以抑制这种影响，这一点已通过概念验证实验得到证实，在该实验中，我们成功地测量了20、25、30、35和40摄氏度不同温度下的相同曲率。
We propose temperature independent fiber bending sensor for catheters, which uses a multicore fiber with a Bragg grating inscribed in each core and spectral measurement technique based on intensity correlation of optical signals based on two-photon absorption process in a silicon avalanche photodiode. Although fiber Bragg gratings are generally sensitive to temperature change, the effect can be suppressed by processing the spectral data of reflected light from all the Bragg gratings, which was confirmed by the proof-of-concept experiment, where we successfully measured the same curvature for different temperature of 20, 25, 30, 35 and 40 degrees Celsius.