Abstract

Single crystal fibers (SCF) are considered to be a combination of bulk crystals and conventional fibers, thereby possessing the stable physical and chemical properties accompanied with excellent waveguide properties. This paper gives a detailed introduction to the development history of single crystal fibers, including the evolution of the growth technique and the optimization of the growth process. Laser-heated pedestal growth (LHPG) and Micro-pulling-down (μ-PD) methods are considered to be the most widely used growth techniques for growing single crystal fibers, and the advantages of the two methods are also introduced in detail. The second part of this paper describes the characterization of single crystal fibers, including diameter fluctuation, crystal quality and optical losses. A series of cladding approaches for SCF, such as magnetron sputtering, sol–gel, liquid phase epitaxy, co-drawing LHPG, ion implantation and micro-structure cladding will be reviewed. In addition, the research status of single crystal fiber laser and single crystal fiber sensor are also summarized in view of the current research foundation.

Graphi Abstract

Single crystal fiber (SCF) is a diversified functional crystal material. The growth methods, characterization method, cladding approaches and applications of SCF are described in detail.

中文翻译：

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单晶纤维：多种功能晶体材料

摘要

单晶纤维（SCF）被认为是块状晶体和常规纤维的组合，因此具有稳定的物理和化学性质以及出色的波导性质。本文详细介绍了单晶纤维的发展历史，包括生长技术的发展和生长过程的优化。激光加热基座生长（LHPG）和微拉（μ-PD）方法被认为是用于生长单晶纤维的最广泛使用的生长技术，并且还详细介绍了这两种方法的优点。本文的第二部分描述了单晶纤维的特性，包括直径波动，晶体质量和光学损耗。SCF的一系列包覆方法 例如磁控管溅射，溶胶-凝胶，液相外延，共画LHPG，离子注入和微结构熔覆等。此外，结合目前的研究基础，对单晶光纤激光器和单晶光纤传感器的研究现状进行了总结。

图形摘要

单晶纤维（SCF）是一种功能多样的晶体材料。详细介绍了SCF的生长方法，表征方法，熔覆方法及其应用。