研究目的
Investigating the ultrasensitive microfiber refractive index sensor based on the core offset Mach-Zehnder interference fiber structure for applications in environmental protection, chemistry, and biomedicine.
研究成果
The proposed microfiber sensor demonstrated ultrahigh RI sensitivity, making it a potential device for developing novel biosensors for medical diagnostics in the field of biomedicine. The sensor's advantages include low-cost and easy fabrication.
研究不足
The study focused on a specific RI range (1.410 to 1.413) and core offset distance (7.5 μm) and tapered diameter (9 μm), which may limit its applicability to other ranges or configurations.
1：Experimental Design and Method Selection:
The study proposed a novel ultrasensitive microfiber RI sensor based on MZI using core offsets fiber structure. The methodology involved fabricating a core offset MZI and tapering it to microfibers.
2：Sample Selection and Data Sources:
Three sensor samples with different core offset distances (2.5, 5, and 7.5 μm) were fabricated. The influence of core offset distance on the spectral response was investigated.
3：5, 5, and 5 μm) were fabricated. The influence of core offset distance on the spectral response was investigated.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: Equipment included a manual eccentric fusion splicer (Fujikura 80c), an oxygen-hydrogen flame based microfiber tapering system (OC-2010 JILONG), a broadband light source (BBS, SC-5-FC), and an optical spectrum analyzer (OSA, AQ6370).
4：0).
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The core offset SMF was tapered to microfibers. The transmission spectra of the samples were measured, and Fast Fourier transform was performed to analyze the efficiency of exciting cladding modes.
5：Data Analysis Methods:
The wavelength shifts of the sensors were measured as RI increased, and the sensitivity was calculated based on these shifts.
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