研究目的
Investigating the polarization properties of single-mode optical fiber couplers (OFCs) made out of Chalcogenide glass and adjusting their polarization dependence through aspect ratio engineering.
研究成果
The study demonstrates that the polarization dependence of ChG OFCs can be adjusted from highly polarization dependent to polarization independent by engineering their aspect ratio. This provides the possibility of using the OFC as a polarization beam splitter in specific spectral ranges.
研究不足
The study is limited to single-mode ChG OFCs and their polarization properties, with potential for optimization in controlling the aspect ratio more precisely for desired polarization effects.
1：Experimental Design and Method Selection:
The study involves fabricating ChG OFCs with controlled aspect ratios to explore their polarization properties.
2：Sample Selection and Data Sources:
As2Se3 single-mode fibers are used for fabricating OFCs.
3：List of Experimental Equipment and Materials:
Includes a pulling stage, heater, polarized optical source, polarization controller, and optical spectrum analyzer.
4：Experimental Procedures and Operational Workflow:
Two identical pieces of fiber are placed in parallel on a pulling stage, heated above the softening temperature, and tapered into a uniform diameter fused coupler. The aspect ratio is controlled by adjusting the heater temperature.
5：Data Analysis Methods:
The transmittance of every OFC is characterized with two orthogonally polarized optical inputs, and their transmission through the OFC is observed via the through and cross output ports.
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