Abstract

A two-step photoionization of several potentially laser-active F-aggregate centers is observed in additively colored crystals by using high-intensity 1.06-μm pulses from a Q-switched Nd:YAG laser. The centers produced include the lithium (F₂⁺)_A center in KI, which has lased with tunability from 2.4 to 4.0 μm, and N₁⁺ centers in KBr, which show promise of lasing. Steady-state concentrations of ionized (F₂⁺)_A and N₁⁺ centers are found to be considerably larger than those produced by using blue or near-ultraviolet excitation.

© 1986 Optical Society of America

(F₂⁺)_A centers in additively colored lithium-doped KI and KBr

David R. Foster and Irwin Schneider
Opt. Lett. 11(4) 213-215 (1986)

Optically induced reorientational aggregation and the stability of F₂⁺ color-center lasers

Irwin Schneider and Clifford R. Pollock
Opt. Lett. 14(23) 1315-1317 (1989)

Laser action with (F₂⁺)A centers in additively colored lithium-doped KI

David R. Foster and Irwin Schneider
Opt. Lett. 13(3) 207-208 (1988)

Comparison of extreme-ultraviolet flux from 1.06- and 10.6-μm laser-produced plasma sources for pumping photoionization lasers

O. R. Wood, W. T. Silfvast, J. J. Macklin, and P. J. Maloney
Opt. Lett. 11(4) 198-200 (1986)

Stable color-center laser in OH-doped NaCl operating in the 1.41- to 1.81-μm region

Joseph F. Pinto, Efstratios Georgiou, and Clifford R. Pollock
Opt. Lett. 11(8) 519-521 (1986)