Surface plasmon resonance refractive index sensor with progressive fiber expander

In this letter, a refractive index sensor based on surface plasmon resonance (SPR) with progressive fiber expander is presented and verified. The coupler is fabricated by continuously splicing multi-mode fibers of different core diameter in front of the no core fiber (NCF), which enhanced the evanes...

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Bibliographic Details
Published in:IEEE photonics technology letters 2024-07, p.1-1
Main Authors: Tian, Tian, Han, Jinyang, Ma, Yiwei, Li, Min, Mu, Zonghao, Li, Song, Lu, Chunlian, Geng, Tao
Format: Article
Language:English
Subjects:
Gold
Optical fiber couplers
Optical fiber sensors
Optical surface waves
Progressive fiber expander
Refractive index measurement
Sensitivity
SPR
Sputtering
Surface treatment
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Summary:In this letter, a refractive index sensor based on surface plasmon resonance (SPR) with progressive fiber expander is presented and verified. The coupler is fabricated by continuously splicing multi-mode fibers of different core diameter in front of the no core fiber (NCF), which enhanced the evanescent field reaching to the metal surface. Experimental results indicate that, the sensor achieves a maximum sensitivity of 7307.64 nm/RIU within the RI range of 1.33-1.42. Furthermore, the proposed SPR sensing exhibits excellent repeatability, high mechanical strength, and cost-effectiveness, offering possibilities for designing high-performance SPR sensors.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2024.3422395