the best optical-quality sapphire fibers have been grown by researchers using the
LHPG method [4, 5]. Optical-quality sapphire fibers have increased in popular-
ity over the years and, now, are used in various fields and applications such as
laser-power delivery probes and tips for surgical and treatment lasers; rugged
high-temperature thermometers for industrial applications; visible and infrared
(IR) transmitting waveguides for spectroscopy applications [6]; and high-
temperature–resistant sensing elements in optical fiber Fabry–Perot extrinsic
sensors and devices.
This chapter begins by describing the two most popular methods used to grow
single-crystal sapphire fiber: LHPG and the EFG. The positive and negative
aspects of each method are reviewed. ...