Abstract

Y3Al5O12 (YAG) fiber-shaped single crystals about 1m long and 0.3-1.0 mm in diameter, intended for laser applications, are discussed. Crystals with these dimensions are difficult to produce by simply cutting bulk crystals grown by the Czochralski technique or other related melt growth processes. The shape of the fibers permits the development of new optical components based on YAG crystals that have optical and thermal efficiencies that approach those of silica glass fibers. This chapter compares the physicochemical properties of YAG bulk and fiber crystals. The potential development of lasers based on single-crystalline fibers is discussed.

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