Transient and stable color centers created by optical pumping at 308 nm have been studied in Ce3+:YLiF4. Since the color centers are absorptive at the cerium emission wavelengths, they degrade the Ce3+:YLiF4 laser performance. The color centers are produced following a multiphoton ionization of the Ce3+ ions. Rate equations that incorporate both creation and photobleaching processes are developed to model the observed kinetics and intensity dependence of the color-center density. Measurements of the single-pass gain at 325 nm as a function of the repetition rate of the pump laser are interpreted in terms of the relaxation time of the transient centers.
© 1989 Optical Society of America
Original Manuscript: November 3, 1988
Manuscript Accepted: March 1, 1989
Published: July 1, 1989
Ki-Soo Lim and D. S. Hamilton, "Optical gain and loss studies in Ce3+:YLiF4," J. Opt. Soc. Am. B 6, 1401-1406 (1989)