Abstract

Consider the three transport processes of charge carriers (typically due to Fe²⁺↔Fe³⁺); with the photovoltaic effect dominating in iron-doped lithium niobate, the photorefractive effects of one- beam incidence and two-wave mixing are analyzed and experiments made. The refractive-index spatial variation diverges the incident beams like a lens in the direction of the c axis, which is demonstrated by using a He–Ne laser beam.

© 1986 Optical Society of America