We present a simple two step process for the fabrication of single crystal germanium core fibers. Germanium is deposited into a capillary in a highly polycrystalline state using the pressure assisted melt filling technique. This core material is then melted and recrystallized in single crystal form using a scanning CO₂ laser process. This combination of techniques is an efficient means of producing fibers of practical lengths and core sizes for optical and optoelectronic devices. We produce small core fibers of $\mathrm {1~ \mu \text {m} }$ radii and lengths in the centimeter regime. It is anticipated that this process can be optimized so that sub-micron cores can be produced to create fibers that have single-mode operation.

中文翻译：

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通过压力辅助物理填充和 CO2 激光重结晶生产的单晶锗芯光纤

我们提出了一个简单的两步法来制造单晶锗芯光纤。使用压力辅助熔体填充技术将锗以高度多晶状态沉积到毛细管中。然后使用扫描 CO ₂激光工艺将这种核心材料熔化并重结晶为单晶形式。这种技术组合是生产用于光学和光电设备的具有实用长度和纤芯尺寸的光纤的有效手段。我们生产小芯纤维 $\mathrm {1~ \mu \text {m} }$ 厘米范围内的半径和长度。预计可以优化此过程，以便可以生产亚微米纤芯以创建具有单模操作的光纤。