When a pulse superposed on a cw background propagates through an erbium-doped fiber amplifier with a negative group velocity, either pulse broadening or pulse compression can be observed. These effects can be explained in terms of two competing mechanisms: gain recovery and pulse spectrum broadening. The distortion of the pulse shape caused by these effects depends on input pulse width, pump power, and background-to-pulse power ratio. With the proper choice of these three parameters, we can obtain significant pulse advancement with minimal pulse distortion.
© 2007 Optical Society of America
Fiber Optics and Optical Communications
Original Manuscript: December 22, 2006
Manuscript Accepted: January 2, 2007
Published: March 19, 2007
Heedeuk Shin, Aaron Schweinsberg, George Gehring, Katie Schwertz, Hye Jeong Chang, Robert W. Boyd, Q-Han Park, and Daniel J. Gauthier, "Reducing pulse distortion in fast-light pulse propagation through an erbium-doped fiber amplifier," Opt. Lett. 32, 906-908 (2007)