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Fibre lasers; Q-switched fibre lasers; photonic crystal fibre; Cr⁴⁺:YAG saturable absorber.

In this paper we report linearly polarized high average power passive Q-switched ytterbium-doped photonic crystal fibre laser with a Cr⁴⁺:YAG crystal as a saturable absorber. An average output power of 9.4 W with pulse duration of 64 ns and pulse repetition rate of 57.4 kHz with a slope efficiency of 52% was achieved. Measured polarization extinction ratio (PER) of the Q-switched laser output was 10.5 dB.

Usha Chakravarty¹ Antony Kuruvilla¹ Rajpal Singh¹ B N Upadhyay¹ K S Bindra¹ S M Oak¹

1. Solid State Laser Division, Raja Ramanna Centre for Advanced Technology, Indore 452 013, India

Published

February 2014

Early published

14 February 2014