Dual-channel SPR fiber sensor by adjusting incident angle in fiber

Zongda Zhu; Lu Liu; Yong Wei; Yaxun Zhang; Yu Zhang; Zhihai Liu

doi:10.1117/12.2267482

23 April 2017 Dual-channel SPR fiber sensor by adjusting incident angle in fiber

Zongda Zhu, Lu Liu, Yong Wei, Yaxun Zhang, Yu Zhang, Zhihai Liu

Proceedings Volume 10323, 25th International Conference on Optical Fiber Sensors; 1032392 (2017) https://doi.org/10.1117/12.2267482
Event: 25th International Conference on Optical Fiber Sensors, 2017, Jeju, Korea, Republic of

Abstract

We propose a novel dual-channel Surface Plasmon Resonance (SPR) fiber sensors based on the incident angle adjusting method. By grinding fiber tip to form wedge-shape with different angles, we can easier adjust the incident angle in fiber, and then the SPR wavebands will change corresponding. The simulation and experiment demonstrate that the SPR wavebands will red-shift with increasing of the fiber grinding angle. Based on this, we cascade two fiber tips whose grinding angles are 5° and 15° respectively. Under the tests of the refractive index (RI) range from 1.333 to 1.385, the SPR wavebands are 576~683nm and 677~955nm respectively. Therefore, we can demodulate SPR signal by wavelength division multiplexing (WDM) technology. Sequentially, we can detect two analytes simultaneously. This dual-channel SPR fiber sensor has important significance in the fields of multichannel liquid refractive indices and temperature selfreference measurements.

Citation Download Citation

Zongda Zhu, Lu Liu, Yong Wei, Yaxun Zhang, Yu Zhang, and Zhihai Liu "Dual-channel SPR fiber sensor by adjusting incident angle in fiber", Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 1032392 (23 April 2017); https://doi.org/10.1117/12.2267482

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