研究目的
To report a highly coherent broadband supercontinuum generation in As-S chalcogenide tapered fibers pumped at 3.75 μm, investigating the effect of different waist core diameters on SC spectra coherence properties.
研究成果
A 1.5-8.3 μm broadband SC generation with high coherence property was achieved from a 15-cm-long As-S tapered fiber pumped at 3.75 μm. The study demonstrated that slightly larger core diameters can ensure higher coherence property of the SCs, beneficial for applications requiring high coherence.
研究不足
The study is limited by the accuracy of dispersion calculation at the edge regions due to the measurement wavelength range of the ellipsometer. The coherence property of initial SC cannot be shown in the range of 1.3-2.5 μm.
1：Experimental Design and Method Selection:
The study involved the fabrication of As-S fiber preforms via isolated stacked extrusion and the use of a homemade tapering platform to control the waist diameters of tapered fibers for achieving all-normal dispersion characteristics.
2：Sample Selection and Data Sources:
As2S3 core and As38S62 cladding glasses were used to fabricate the fiber preforms.
3：List of Experimental Equipment and Materials:
A fiber drawing tower, Fourier transform infrared spectroscopy (Thermo Scientific, Nicolet380, USA), ellipsometry (J.A. Woollam IR-Vase II, USA), Super Long Depth of View Optical Microscope (Keyence, VHX-1000E, JAPAN), and FTIR (Thermo Scientific, Nicolet5700, USA) were used.
4：Experimental Procedures and Operational Workflow:
The fiber preforms were drawn into step-index fibers and then tapered using a homemade tapering platform. The SC generation was measured using an infrared spectrometer (Infrared systems, FPAS, USA).
5：Data Analysis Methods:
The coherence properties of the SC spectra were analyzed using numerical simulation.
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