All-fiber pulsewidth tunable actively Q-switched erbium fiber laser using abrupt-tapered Mach-Zehnder block filter

摘要

We demonstrate pulsewidth tunable Q-switched erbium fiber lasers using in-line high extinction ratio (>30 dB) abrupt-tapered fiber Mach-Zehnder block filter and tunable Fabry-Perot filter in laser cavity. The pulsewidth can be tuning over 78 ns - 23 ms.