Recent improvements on mid-IR chalcogenide optical fibers
Recent improvements on mid-IR chalcogenide optical fibers
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DOI：
10.1117/12.2050488
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发表时间：
2014-06
期刊：
影响因子：
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通讯作者：
C. Lafond;J. Couillard;Jean-Luc Delarosbil;Fernand Sylvain;Philippe de Sandro
中科院分区：
文献类型：
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作者：
C. Lafond;J. Couillard;Jean-Luc Delarosbil;Fernand Sylvain;Philippe de Sandro
改进了硫化砷（As-S）和硒化砷（As-Se）光纤的制备工艺，提高了光纤在中红外区的传输能力。as - s或as - se光纤的典型衰减谱中存在S-H、Se-H、O-H等杂质带，这些杂质带限制了其工作，导致中红外衰减损失增大。前体纯化方法和玻璃加工得到了改进，以尽量减少这些杂质带。对于As- S光纤，2.7 μm附近的衰减为0.12 dB/m， S- h浓度低于0.3 ppm。在As-Se光纤中，6 μm处的衰减最小值为0.2 dB/m， Se-H浓度小于0.5 ppm。人们还努力改善机械性能，这些性能通常受到拉伸条件或玻璃中含有的异质夹杂物等几个参数的影响。双坩埚法获得了高质量的芯/包层界面，从而提高了纤维的强度。包裹体主要由碳和硅颗粒组成。这些杂质从最初的前体进入玻璃，也通过与仪器材料的相互作用形成。由于工艺改进，杂质颗粒最小化，As-Se和As-S纤维的抗拉强度分别达到0.32 GPa和0.41 GPa。
Fabrication process of arsenic-sulfide (As-S) and arsenic-selenide (As-Se) optical fibers has been improved to enhance the transmission in the mid-IR region. Typical attenuation spectrum of As-S or As-Se optical fibers shows impurities bands, such as S-H, Se-H, O-H, which limit their operation and cause the increase of the attenuation loss in the mid-IR. Precursors purification methods and glass processing were improved to minimise those impurities bands. Regarding As- S fibers, the attenuation around 2.7 μm is 0.12 dB/m and S-H concentration is lower than 0.3 ppm. In the case of As-Se fibers, the minimum of attenuation located at 6 μm is 0.2 dB/m and Se-H concentration is lower than 0.5 ppm. Efforts have been also made to improve the mechanical properties which are usually affected by several parameters such as drawing conditions or heterogeneous inclusions contained in the glass. The double-crucible method gives high quality core/clad interface and consequently increases the strength of the fiber. Inclusions consist mainly of carbon and silica particles. Those impurities enter the glass from initial precursors and are also formed by interaction with the apparatus material. Thanks to the process improvement, impurities particles are minimized and tensile strengths up to 0.32 GPa and 0.41 GPa are reached for As-Se and As-S fibers respectively.