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Q-switched and Mode-locked 3.5 μm Fiber Laser

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Abstract

We report on a tunable mid-infrared erbium fiber laser mode-locked via frequency shifted-feedback provided by an acousto-optic tunable filter. Q-switched pulses were produced when the driving frequency of the acousto-optic tunable filter was square-wave modulated.

© 2020 The Author(s)

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