We report the results of an experimental study aimed at improving the performance of actively Q-switched fiber lasers. Unlike generic design schemes employing photonic crystal fibers, largemodal diameter fibers or double-clad fibers, we demonstrate a high-power, actively Q-switched laser based on standard com- munication erbium doped fibers with peak irradiance beyond the state-of-the-art at 3.1 GW/cm2 . The laser had 2.2 kW peak power, 15.5 ns pulse duration and 36.8 µJ pulse energy. We have also investigated the dynamics of pulse generation and have success- fully suppressed pulse instabilities caused by backscattered laser emission reaching the pump laser diodes.
|Number of pages||8|
|Journal||IEEE Journal of Selected Topics in Quantum Electronics|
|Early online date||16 Jan 2014|
|Publication status||Published - Sept 2014|
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- active Q-switching
- erbium-doped fiber laser
- fiber lasers
- giant pulse