In this paper a theoretical model of self-similar amplifications is studied experimentally in an all-fiber high power amplifier. The output vs. input characteristics of this amplifier are measured when the various femtosecond pulses at different energies and different shapes are inputted. It is verified that the all-fiber high power amplifier system is indeed operating in the way of self-similar amplifications by analyzing the data of the amplified pulses along with the data of the input pulses. Finally, nearly transform-limited ultra-short pulses with high average power of 500 mW and time-bandwidth product of 0.342 are obtained by compressing the output pulses from the fiber amplifier to the ultra-short pulses of 113 fs at the center wavelength of 1552nm using a segment of DCFs with large negative group velocity dispersion. The results demonstrated that the operating mode of the amplifier is consistent with the typical self-similar amplification model.

Date Published: 21 February 2011
PDF: 12 pages
Proc. SPIE 7914, Fiber Lasers VIII: Technology, Systems, and Applications, 79142S (21 February 2011); doi: 10.1117/12.875854

Published in SPIE Proceedings Vol. 7914:
Fiber Lasers VIII: Technology, Systems, and Applications
Jay W. Dawson, Editor(s)