Abstract

We report on the observation of unstable two-wave mixing in a Yb-doped optical fiber amplifier induced by frequency modulation of a single-frequency laser. What is believed to be a reflection of the main signal experiences a gain much higher than that provided by the optical pumping and potentially limits power scaling under frequency modulation. We propose an explanation for the effect based on the dynamic population and refractive index gratings formed by the interference between the main signal and its slightly frequency-detuned reflection.

© 2022 Optica Publishing Group

Theory and experiment of transient two-wave mixing in Yb-doped single-frequency fiber amplifiers induced by frequency modulation

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60.4 W continuous-wave single-frequency laser output from a two-stage Nd:YAG single-crystal fiber amplifier

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Single frequency tunable UV laser at 308 nm based on all-fiberized master oscillator power amplifiers

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