Q-switched erbium-doped fiber laser based on MZI and ECL

In this paper, we report, for the first time to our knowledge, a new decreasing Q-switched pulse width method. We can reduce the pulse width of the MZI Q-switched by moving the pulse of ECL (whose pulse width is narrower than the MZI Q-switched pulse) into the MZI Q-switched pulse. And in our experiment, the pulse width of the MZI Q-switched is 4? s, the ultimate pulse width is O.8? s. So the ultimate pulse width is one fifth of the MZI Q-switched.