Suppression of self-pulsing in Yb fibre lasers coupled with external Fabry-Perot cavity

초록

A simple technique to suppress self-pulsing behaviour in a fibre laser employing a two-mirror Fabry-Perot external feedback cavity is reported. Feedback provided by the external Fabry-Perot cavity enforces the fibre laser to oscillate in the selected longitudinal modes, resulting in robust laser operation without self-pulsing. This technique has been successfully applied to a double-clad Yb fibre laser, yielding a stable continuous-wave output of up to 9.8 W at 1050 nm. The advantages of this technique and the prospects of further improvement are discussed.

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