Abstract

Warde et al.¹ and McNamara et al.² first reported that rhodium-doped, or blue barium titanate, BaTiO₃:Rh, has extended the photorefractive sensitivity of barium titanate into the near infrared. Rhodium-doped barium titanate has applications for injection-locking laser-diode arrays and bars.³ However, the evolution of compact blue-wavelength solid-state laser sources makes feasible the use of visible-wavelength light for photorefractive applications. We describe a reduction process to make n-type BaTiO₃:Rh that is faster and more sensitive than as-grown crystals in the visible.

© 1995 Optical Society of America