Side-polished SMS based RI sensor employing macro-bending perfluorinated POF

Xuezhi Zhang; Boyue Yang; Junfeng Jiang; Kun Liu; Xiaojun Fan; Zhaozhu Liu; Min Peng; Guanlong Chen; Tiegen Liu

doi:10.29026/oea.2021.200041

Journals >Opto-Electronic Advances >Volume 4 >Issue 10 >Page 200041-1 > Article

Opto-Electronic Advances
Vol. 4, Issue 10, 200041-1 (2021)

Side-polished SMS based RI sensor employing macro-bending perfluorinated POF

Xuezhi Zhang, Boyue Yang, Junfeng Jiang^*, Kun Liu, Xiaojun Fan, Zhaozhu Liu, Min Peng, Guanlong Chen, and Tiegen Liu^*

DOI: 10.29026/oea.2021.200041 Cite this Article

Xuezhi Zhang, Boyue Yang, Junfeng Jiang, Kun Liu, Xiaojun Fan, Zhaozhu Liu, Min Peng, Guanlong Chen, Tiegen Liu. Side-polished SMS based RI sensor employing macro-bending perfluorinated POF[J]. Opto-Electronic Advances, 2021, 4(10): 200041-1 Copy Citation Text

EndNote(RIS)

BibTex

Plain Text

show less

Abstract

A refractive index (RI) sensor based on perfluorinated plastic optical fiber (PF-POF) is introduced in this paper. The PF-POF as multi-mode fiber was side-polished (SP) to form a macro-bending single-mode-multimode-single-mode (SMS) structure. Both ends of the sensor were closely connected to single-mode quartz optical fiber (SMF). The spectral characteristics of the sensor are measured, analyzed and discussed. The results show that when the length of PF-POF is 8 cm, the macro-bending radius is 3 cm, and the SP-depth is 20 μm. The intensity sensitivity reaches -219.504 dBm/RIU in the range of RI = 1.330 ~ 1.356. A reference is provided for the application of PF-POF in RI sensor in the future. The sensor is featured with low-cost, good flexibility and high efficiency.

$ {d_0} = \frac{\lambda }{{2{\rm{\pi}} }}\frac{1}{{\sqrt {n_1^2{{\sin }^2}\theta - n_2^2} }} \;,$

(1)

View in Article

$ {\theta _i} = \frac{{\rm{\pi}} }{2} - {\theta _0} - iP \;.$

(2)

View in Article

$\begin{split} {I'} = & {\left( {\frac{{\cos \theta {{ - }}\sqrt {n_{01}^2{{ - }}s{\text{i}}{{\text{n}}^{\text{2}}}\theta } }}{{\cos \theta + \sqrt {n_{01}^2{{ - }}s{\text{i}}{{\text{n}}^{\text{2}}}\theta } }}} \right)^2}{I_{\rm{S}}} \\ + &{\left( {\frac{{n_{01}^2\cos \theta {{ - }}\sqrt {n_{01}^2{{ - }}s{\text{i}}{{\text{n}}^{\text{2}}}\theta } }}{{n_{01}^2\cos \theta + \sqrt {n_{01}^2{{ - }}s{\text{i}}{{\text{n}}^{\text{2}}}\theta } }}} \right)^2}{I_{\rm{P}}}\;, \end{split} $

(3)

View in Article

$\begin{split} {I{''}} = & \frac{{\sqrt {n_{01}^2 - {{\sin }^2}\theta } }}{{\cos \theta }}{\left( {\frac{{2\cos \theta }}{{\cos \theta + \sqrt {n_{01}^2 - {{\sin }^2}\theta } }}} \right)^2}{I_{\rm{S}}} \\ + &\frac{{\sqrt {n_{01}^2 - {{\sin }^2}\theta } }}{{\cos \theta }}{\left( {\frac{{2{n_{01}}\cos \theta }}{{\sqrt {n_{01}^2 - {{\sin }^2}\theta } + n_{01}^2\cos \theta }}} \right)^2}{I_{\rm{P}}} \;, \end{split}$

(4)