C. McIntosh, J. -. P. Delavaux, J. Shmulovich, S. Chandrasekhar, and H. K. Kim, "Gain flatness of a 980nm pumped planar optical waveguide amplifier,"
in Optical Amplifiers and Their Applications, A. Mecozzi, M. Shimizu, and J. Zyskind, eds.,
Vol. 44 of OSA Trends in Optics and Photonics
(Optical Society of America, 2000), paper OTuD3.