Design of a Surface Plasmon Resonance Temperature Sensor with Multi-Wavebands Based on Conjoined-Tubular Anti-Resonance Fiber

In this work, a surface plasmon resonance (SPR) temperature sensor based on con-joined-tubular anti-resonance optical fiber (CTF) was theoretically designed and analyzed using the finite element method. The CTF cladding composed of eight pairs conjoined tubes, one or two holes tubes were selectively coated with gold to generate SPR effect. Alcohol injected into core work as sensing medium vapor deposition. proposed structure exhibited excellent birefringence produced more than six resonant peaks in different wavebands X Y polarization. positions those sensitive change, simulated sensitivity about 3.2–3.6 nm/°C. multiple working could be used for self-verification. Moreover, influence structural parameters performance detail. Possessing features high sensitivity, good birefringence, measuring wavebands, self-verification, CTF-based has great potential practical applications such biological research chemical sensing.