D. A. Hammons, L. Shah, J. Eichenholz, Q. Ye, M. Richardson, B. H. T. Chai, A. Chin, and J. Cary, "980 nm diode pumped laser operation and wavelength tunability performance in Yb3+:YCOB,"
in Advanced Solid State Lasers, M. Fejer, H. Injeyan, and U. Keller, eds.,
Vol. 26 of OSA Trends in Optics and Photonics
(Optical Society of America, 1999), paper ME7.