Laserati

We have a new publication online now: multiwatts narrow linewidth fiber Raman amplifiers. Basically, the paper shows fiber Raman amplifier can be used to amplify narrow linewidth laser to a useful power level, while linewidth keeping narrow. This would be a surprise to most laser researchers. In this specific report, we have obtained 4.8 W, ~10MHz 1178nm laser with 27dB gain and more than 10% efficiency. The tricks and reason are explained in the paper.

Narrow linewidth, 100 W cw Yb^3+-doped silica fiber laser with a point-by-point Bragg grating inscribed directly into the active core - Nemanja Jovanovic, Mattias Åslund, Alexander Fuerbach, Stuart D. Jackson, Graham D. Marshall, Michael J. Withford
We report on the power scaling to 103 W of a 1.1 μm continuous-wave Yb^3+-doped silica fiber laser incorporating a point-by-point (PbP) fiber-Bragg grating inscribed directly into the active core using 800 nm femtosecond laser pulses. The spectrum of the laser exhibited a narrow linewidth ... [Opt. Lett. 32, 2804-2806 (2007)] [Optics Letters]