研究目的
Investigating a phase mask inscription technique for creating chirped fiber Bragg gratings with nonhomogeneous periods using two-beam interferometry and analyzing its dependence on the coherence properties of the inscription laser.
研究成果
The chirped phase mask interferometer is effective for inscribing chirped fiber Bragg gratings with good wavelength versatility, especially when considering the coherence properties of the laser systems used. The technique shows potential for applications in resonator mirrors for fiber laser setups and special filters for biophotonic applications.
研究不足
The study is limited by the coherence properties of the inscription lasers used, which affect the maximum effective length of the chirped fiber Bragg gratings and their re?ection bandwidth.
1：Experimental Design and Method Selection:
The study employs a phase mask inscription technique with two-beam interferometry using a lateral nonhomogeneous beam splitter.
2：Sample Selection and Data Sources:
Experiments were conducted with deep ultraviolet excimer and femtosecond laser sources on hydrogen-loaded commercial single-mode fibers.
3：List of Experimental Equipment and Materials:
Includes a Mantis-Legend Elite-Tripler femtosecond laser from Coherent Inc. and a Compex 150 T KrF excimer laser from Lambda Physics, now Coherent.
4：Experimental Procedures and Operational Workflow:
The method involves creating gratings with nonhomogeneous periods and analyzing the influence of laser coherence properties.
5：Data Analysis Methods:
The study examines the re?ection bandwidth and dispersion of the chirped gratings.
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