中国物理B ›› 2023, Vol. 32 ›› Issue (3): 30702-030702.doi: 10.1088/1674-1056/ac7e3b
Yong Wei(魏勇), Xiaoling Zhao(赵晓玲), Chunlan Liu(刘春兰)†, Rui Wang(王锐), Tianci Jiang(蒋天赐), Lingling Li(李玲玲), Chen Shi(石晨), Chunbiao Liu(刘纯彪), and Dong Zhu(竺栋)
Yong Wei(魏勇), Xiaoling Zhao(赵晓玲), Chunlan Liu(刘春兰)†, Rui Wang(王锐), Tianci Jiang(蒋天赐), Lingling Li(李玲玲), Chen Shi(石晨), Chunbiao Liu(刘纯彪), and Dong Zhu(竺栋)
摘要: Fiber cladding surface plasmon resonance (SPR) sensors have few structures, and a clad SPR sensor based on S-type fiber is proposed in this paper. This new type of fiber cladding SPR sensor was formed by electrofusing an S-shaped structure on the fiber to couple the light in the fiber core to the cladding. In this paper, the effects of fiber parameters on the performance of the sensor were studied by simulation and experiment. Based on the conclusion that the smaller the core diameter is, the closer the working band of the SPR resonance is to long wavelengths, and that the geometric characteristics mean that a multimode fiber can receive the fiber cladding light from a small core diameter few-mode fiber, a dual channel SPR sensor with a double S-type fiber cascade was proposed. In the refractive index detection range of 1.333-1.385 refractive index units (RIU), the resonant working band of channel I is 627.66 nm-759.78 nm, with an average sensitivity of 2540.77 nm/RIU, and the resonant working band of channel II is 518.24 nm-658.2 nm, with an average sensitivity of 2691.54 nm/RIU. The processing method for the S-type fiber cladding SPR sensor is simple, effectively solving the problem of this type of SPR sensor structure and the difficult realization of a dual channel. The sensor is expected to be used in the fields of medical treatment and biological analysis.
中图分类号: (Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing)