The Micro-control Refractive Index Sensor of Dual-metal Antiresonance Optical Fiber

With the development of artificial intelligence for complex environment monitoring technology, new sensors based on the combination of diversified customized optical fiber waveguides and functional materials have become an important solution to meet the diverse perceptions in complex environments. Then, for solving the concentration monitoring problem of multi-channel microfluidics, the bimetallic anti-resonant fiber structure is proposed in this paper, which realize the multi-band microfluidic sensor of bimetallic reverse resonant fiber. Theoretical results show that the sensor achieves the surface plasma resonance (SPR) coupling of the core mode and the metal film at multiple bands of 1450 nm, 1650 nm and 1700 nm, then uses this feature to achieve refractive index sensing in three bands. The corresponding results have potential applications in the field of multimetallic microstructure fiber fluid sensing in the air core, and provide new ideas for the design of multi-band SPR resonance sensors, which are expected to be applied in the field of biochemical monitoring.