Abstract

Upconversion laser emission has been achieved in BaY₂F₈:Er 5% by pumping of either the ground state or an excited state of the Er³⁺ ion. The initial excitation step has been identified with precise measurement data of the Stark level structure of the Er³⁺ ion in this system. Small increments in the pump wavelength can cause the laser to switch from laser operation in the blue to laser operation in the green because of changes in the specific pumping pathway.

© 1994 Optical Society of America

Upconversion laser emission from Yb³⁺-sensitized Tm³⁺ in BaY₂F₈

R. J. Thrash and L. F. Johnson
J. Opt. Soc. Am. B 11(5) 881-885 (1994)

Modified Bridgman growth of oriented Er-doped and Tm-doped BaY₂₋xYbxF₈ crystals for upconversion visible laser operation

Jonathan J. Owen, Anthony K. Cheetham, Neil A. Nighman, Richard H. Jarman, and Robert J. Thrash
J. Opt. Soc. Am. B 11(5) 919-922 (1994)

Excitation scheme for the upper energy levels in a Tm:Yb:BaY₂F₈ laser crystal

M. A. Noginov, M. Curley, P. Venkateswarlu, A. Williams, and H. P. Jenssen
J. Opt. Soc. Am. B 14(8) 2126-2136 (1997)

Upconversion luminescence of Er and Cr in YSGG laser crystals

R. Micheletti, P. Minguzzi, M. A. Noginov, and M. Tonelli
J. Opt. Soc. Am. B 11(10) 2095-2099 (1994)

Laser-relevant spectroscopy and upconversion mechanisms of Er³⁺ in Ba₂YCl₇ pumped at 800 nm

R. Burlot-Loison, M. Pollnau, K. Krämer, P. Egger, J. Hulliger, and H. U. Güdel
J. Opt. Soc. Am. B 17(12) 2055-2067 (2000)