A. Gomes, M. T. Carvalho, M. L. Sundheimer, M. B. Silva, J. P. Weid, W. Margulis, and F. Carlsson, "Distributed-gain measurements and splice loss characterization in S-band TDFA by coherent optical frequency-domain reflectometry,"
in Optical Amplifiers and Their Applications, J. Nagel, S. Namiki, and L. Spiekman, eds.,
Vol. 77 of OSA Trends in Optics and Photonics Series
(Optical Society of America, 2002), paper OMD4.