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Intracavity polarization control in mode-locked Er-doped fibre lasers using liquid crystals

Nikodem M., Krzempek K., Zygadlo K., Dudzik G., Waz A., Abramski K., Komorowska K.

Opto-Electronics Review

2014

Vol. 22, No. 2

113-117

In this paper we present a novel configuration of an NPR mode-locked Er-doped laser. This new optical setup uses voltage controlled LC cells to replace standard retarders (quarter- and half-waveplates) inside the laser cavity. Using this novel, mechanical-adjustment-free setup a mode-locking was obtained with sub-500 fs pulse duration and an average power exceeding 40 mW. Presented results show that using simple LC cells, an optical layout of an NPR mode-locked laser can be greatly simplified.