We demonstrate blue laser emission from a direct semiconductor laser-diode-pumped Pr3+-doped upconversion fiber laser. This laser produced more than 1 mW of power at a wavelength of 492 nm from pump lasers operating at 830 and 1020 nm.
© 1996 Optical Society of America
D. M. Baney, G. Rankin, and Kok-Wai Chang, "Blue Pr3+-doped ZBLAN fiber upconversion laser," Opt. Lett. 21, 1372-1374 (1996)