研究目的
Investigating the effect of the Titanium Oxide (TiO2) film on the performance of the optical fiber SPR sensor with two kinds of probes.
研究成果
The study demonstrated that coating TiO2 film on optical fiber SPR sensors can enhance refractive index sensitivity and shift the resonance wavelength towards the infrared direction, making the sensors more compatible with fiber optic communication devices.
研究不足
The study focused on two specific structures of optical fiber SPR sensors and the effect of TiO2 film thickness up to 50 nm. The findings may not be directly applicable to other sensor configurations or materials.
1：Experimental Design and Method Selection:
The study involved numerical simulation using the finite element method (FEM) for the D-type optical fiber SPR sensor and experimental investigation for the MSM hetero-core optical fiber SPR sensor.
2：Sample Selection and Data Sources:
Step-index single mode fiber was chosen for simulation, and hetero-core structure was used for experimental fabrication.
3：List of Experimental Equipment and Materials:
Equipment included a magnetron sputtering coater for film coating, a wide spectrum halogen lamp as the light source, and spectrometers for measuring transmission spectrum. Materials included chromium film, gold film, and TiO2 film.
4：Experimental Procedures and Operational Workflow:
The fabrication process involved coating the fiber with chromium, gold, and TiO2 films in sequence, followed by refractive index sensing experiments using glycerol–water mixed solutions.
5：Data Analysis Methods:
The relationship between the resonant wavelength and the refractive index of the solution was analyzed to determine the sensor's performance.
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