Significant improvements in the operation of Er3+-doped silica fiber lasers operating at wavelengths between 1.5 and 1.6 μm are reported. The use of 980 nm as the pump wavelength provides an output that is limited mainly by the quantum efficiency of the lasing process. It is thus considerably more efficient than previous results using ~810-nm pumping, where excited-state absorption degrades the lasing performance. Operation at three discrete output wavelengths is observed and is accounted for by studying gain across the lasing bandwidth.
© 1989 Optical Society of America
Original Manuscript: April 3, 1989
Manuscript Accepted: June 11, 1989
Published: September 15, 1989
W. L. Barnes, P. R. Morkel, L. Reekie, and D. N. Payne, "High-quantum-efficiency Er3+ fiber lasers pumped at 980 nm," Opt. Lett. 14, 1002-1004 (1989)