Growth of Optical Crystals by the Micro-Pulling-Down Method

Akira Yoshikawa, Valery Chani

Research output: Contribution to journalArticlepeer-review

80 Citations (Scopus)


The micro-pulling-down technique is a crystal growth method that has been mostly developed since 1992. The general scheme of the growth system is relatively simple: the mełt (oxide, fluoride, metal) residing in a crucible is transported in downward through microcapillary channel(s) made in the bottom of the crucible. Two driving forces (capillary action and gravity) support the delivery of the melt to the liquid/solid growth interface formed under the crucłble due to a property established temperature gradient. Appropriate configuration of the crucible bottom allows for controlling of the crystal shape (fibers, rods, tubes, plates) and the dimensions of the crystals' cross sections that range approximately from 0.1 to 10 mm. A great number of scientifically and industrially important optical crystal fibers have been successfully produced using this method.

Original languageEnglish
Pages (from-to)266-270
Number of pages5
JournalMRS Bulletin
Issue number4
Publication statusPublished - 2009 Apr


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