Spectrum broadening and reshaping via gain compensation of fiber amplifier C. X. Gao, H. Liu, J. Tao, B. Caussat and W. Zhao Eur. Phys. J. Appl. Phys., 48 1 (2009) 10701 Published online: 08 July 2009 DOI: 10.1051/epjap/2009126