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Journal of Synthetic Crystals ›› 2026, Vol. 55 ›› Issue (7): 983-1004.DOI: 10.16553/j.cnki.issn1000-985x.2026.0074

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Growth Technology of Single-Crystal Fibers

WANG Zhengmin1(), WANG Tao1(), ZHANG Yang2, ZHANG Jian1,3(), TAO Xutang1, JIA Zhitai1,4()   

  1. 1.Institute of Novel Semiconductors,Institute of Crystal Materials,State Key Laboratory of Crystal Materials,Shandong University,Jinan 250100,China
    2.China Building Materials Academy Co.,Ltd.,Beijing 100024,China
    3.Jiangsu Jingying Optoelectronics Technology Co.,Ltd.,Xuzhou 221116,China
    4.Shandong Research Institute of Industrial Technology,Jinan 250100,China
  • Received:2026-04-25 Online:2026-07-20 Published:2026-08-04
  • Contact: WANG Tao, ZHANG Jian, JIA Zhitai

Abstract: As a quasi-one-dimensional material that combines the excellent physical and chemical properties of crystals with the high specific surface area and optical waveguide characteristics of optical fibers, single-crystal fibers hold broad application prospects in fields such as high-power lasers, mid-infrared lasers, radiation detection, and high-temperature sensing. This paper provides a systematic review of the principles, technical characteristics, and research progress of the edge-defined film-fed growth method, the micro-pull-down method, the laser-heated pedestal growth method, and other novel growth techniques. The edge-defined film-fed growth method enables the high-throughput simultaneous growth of hundreds of optical fibers; the micro-pull-down method has been extended to eutectic, metallic, and spring-shaped irregular crystals; the laser-heated pedestal growth method has successfully produced ultra-fine single-crystal optical fibers over 50 m long with a diameter of only 16 μm; the multi-microchannel crucible method has enabled high-throughput fabrication of fluoride optical fibers; the aqueous solution method, meanwhile, provides a low-temperature growth pathway for organic and thermosensitive single-crystal optical fibers, among other applications. Finally, it summarizes the technical challenges and future directions for each method, offering a reference for the preparation and application of single-crystal fibers.

Key words: single-crystal fiber; edge-defined film-fed growth method; micro-pulling-down method; laser-heated pedestal growth method; crystal growth

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