Abstract

To date rare-earth-doped high-power fiber lasers or amplifiers are among the most versatile laser sources in scientific research and industrial applications, not only because of their high beam quality and high efficiency, but also because of their wide range of potential emission spectra. In recent years researchers have successfully scaled the average power and achieved multi kW level with Yb-doped fiber lasers around 1μm [1]. Whenever the spectrally dependent gain or the transmission range of the active medium limits the output power of much-needed laser sources at uncommon wavelengths, frequency conversion represents a versatile option to expand the spectral range at high power level and improve wavelength-dependent applications.

© 2017 IEEE