研究目的
Investigating the fabrication of 2-μm-wavelength-band fiber Bragg gratings (FBGs) using a femtosecond pulsed laser through fiber polyimide coating.
研究成果
The study successfully demonstrated the fabrication of a 2-μm-wavelength-band FBG using a femtosecond pulsed laser through fiber polyimide coating. The FBG exhibited high reflectance, temperature sensitivity, and linearity, making it suitable for applications in fiber lasers and sensors.
研究不足
The study focuses on a specific wavelength band (2-μm) and fiber type (polyimide coating). The method's applicability to other wavelengths or fiber types was not explored.
1：Experimental Design and Method Selection:
A femtosecond pulsed laser was used for point-by-point inscription of FBGs through the fiber coating. The laser was focused by a 63× oil lens to inscribe a first-order FBG with a grating interval of 700 nm.
2：Sample Selection and Data Sources:
A polyimide coating fiber (SM1500(9/125)P) was used. The FBG's reflection and transmission spectra were monitored using an optical spectrum analyzer (OSA).
3：List of Experimental Equipment and Materials:
Femtosecond pulsed laser (Astrella Ultrafast Ti:Sapphire Amplifier), 63× oil lens, polyimide coating fiber, optical spectrum analyzer (YOCOGAWA 6375), and a 3D movement stage.
4：Experimental Procedures and Operational Workflow:
The femtosecond laser was focused through the fiber coating and cladding to inscribe the FBG. The grating's reflection and transmission spectra were monitored in real-time.
5：Data Analysis Methods:
The FBG's temperature and strain characteristics were analyzed based on the shift in the reflection wavelength and the linearity of the response.
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
