研究目的
Investigating the effect of tapered fiber structure on the optical properties of PbS nanomaterials optical fiber amplifier excited by evanescent wave.
研究成果
The study successfully fabricated a PbS nanomaterials fiber amplifier by coating PbS nanomaterials onto tapered fiber using ALD technique. It was found that the tapered structure significantly influences the optical properties, with the fiber exhibiting photoluminescence property at 1300-1650 nm with 980 nm pumping. The fluorescence increases as the waist diameter decreases. The study suggests that this scheme has potential applications in fiber amplifiers, broadband optical sources, and other fiber active devices, but further improvement in the preparation process is needed.
研究不足
The study notes that further research is needed to improve the preparation process, indicating potential areas for optimization in the fabrication of high-performance semiconductor nanomaterial-based optical fiber amplifiers.
1：Experimental Design and Method Selection:
The study involves fabricating a PbS nanomaterials fiber amplifier by coating PbS nanomaterials onto tapered fiber using atomic layer deposition (ALD) technique. The influence of tapered fiber structure on optical properties is analyzed.
2：Sample Selection and Data Sources:
Tapered fibers with diameters of 15, 13, 10, 8, 6 μm were fabricated. PbS nanomaterials were deposited on these fibers under the same conditions.
3：List of Experimental Equipment and Materials:
Fused biconical taper method (Advantech 610G), ALD technology (Beneq, TFS-200, Finland), Pb(tmhd)2 and H2S as precursors, TEM (JEM-2010F, Japan), white-light source, optical spectrum analyzer (ANDO AQ-6315A).
4：Experimental Procedures and Operational Workflow:
Tapered fibers were prepared by heating with a hydrogen-oxygen flame and stretching. PbS thin films were fabricated on the surface of tapered optical fiber by ALD. The optical properties were then measured.
5：Data Analysis Methods:
Loss spectra and fluorescence spectrum were measured and analyzed to understand the effect of tapered structure on optical properties.
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