Based on propagation-rate equations, the influence of different input pulse durations on the properties of Er3+/Yb3+ co-doped double-clad fiber amplifier at dynamic equilibrium was analyzed. The change characteristic ...Based on propagation-rate equations, the influence of different input pulse durations on the properties of Er3+/Yb3+ co-doped double-clad fiber amplifier at dynamic equilibrium was analyzed. The change characteristic of output power sag with pulse duration and repetition rate was shown. Whether single or multi-channel input pulses are amplified, the shorter the input pulse duration is, the smaller the power sags of output pulse will be. At low repetition rate, upper gain values（G upper ） of gain swing are almost the same for different input pulse durations, which tend to the small signal gain, but lower gain value（G lower ） of short input pulse is larger than that of long input pulse. At high repetition rate, lower gain value（G lower ） approaches to upper gain value（G upper ）.展开更多
文摘Based on propagation-rate equations, the influence of different input pulse durations on the properties of Er3+/Yb3+ co-doped double-clad fiber amplifier at dynamic equilibrium was analyzed. The change characteristic of output power sag with pulse duration and repetition rate was shown. Whether single or multi-channel input pulses are amplified, the shorter the input pulse duration is, the smaller the power sags of output pulse will be. At low repetition rate, upper gain values（G upper ） of gain swing are almost the same for different input pulse durations, which tend to the small signal gain, but lower gain value（G lower ） of short input pulse is larger than that of long input pulse. At high repetition rate, lower gain value（G lower ） approaches to upper gain value（G upper ）.
