研究目的
To measure core refractive index changes written by an ultrafast laser irradiation using a fiber optic Mach-Zehnder interferometer.
研究成果
The study demonstrates a simple yet effective approach for quantifying in-fiber effective refractive index changes using a fiber optic Mach-Zehnder interferometer. This method has potential applications in the design and fabrication of in-fiber photonic devices.
研究不足
The technique requires precise alignment and control of the laser irradiation to induce measurable refractive index changes. The method is sensitive to external perturbations that may affect the interferometer's performance.
1：Experimental Design and Method Selection:
A fiber optic Mach-Zehnder interferometer was constructed by splicing a slightly misaligned stub of standard single mode fiber between lead-in and lead-out optical fibers. The spectral shift of the interferometer's transmission fringe pattern was used to quantify the effective core refractive index change.
2：Sample Selection and Data Sources:
Standard single mode fiber (SMF-28 ULL) was used in the experiment.
3：List of Experimental Equipment and Materials:
Fujikura (FSM-40PM) splicer, Spectra-Physics Ti: Sapphire laser, microscope objective lens (NA: 0.75, 40X), optical spectrum analyzer.
4：75, 40X), optical spectrum analyzer.
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The core of the fiber was scanned with a femtosecond laser to induce refractive index changes. The spectral shifts were observed and recorded.
5：Data Analysis Methods:
The spectral shifts were analyzed to estimate the effective refractive index changes using the derived equations.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
