READ ME File For 'DATASET for 5.6 kW peak power, nanosecond pulses at 274 nm from a frequency quadrupled Yb-doped fiber MOPA' Dataset DOI: 10.5258/SOTON/D0399 ReadMe Author: Jing He, Di Lin, Lin Xu, Martynas Beresna, Shaif-Ul Alam, Michalis N. Zervas, Gilberto Brambilla, University of Southampton This dataset supports the publication: Jing He, Di Lin, Lin Xu, Martynas Beresna, Shaif-Ul Alam, Michalis N. Zervas, Gilberto Brambilla. (2018) 5.6 kW peak power, nanosecond pulses at 274 nm from a frequency quadrupled Yb-doped fiber MOPA Optics Express Description: The excel file contains all experimental data used for generating Fig.2 to Fig.4, and the Zip file contains all figures listed in the paper. The figures are as follows: Fig. 1 Schematic diagram of the PM YDFA MOPA and the SHG and FHG system Fig. 2 (a) Output power from the power amplifier as a function of launched pump power (inset: Pulse duration measured at the maximum average output power of 13.6 W); (b) Spectra of the YDFA MOPA at different power levels (inset: detailed spectrum around ?~1097 nm) Fig. 3 (a) Average output power and conversion efficiency of the SHG signal at ?~548 nm as a function of ?~1097 nm fundamental power; (b) Measured beam quality M2 at 6 W of SHG power (inset: Near-field beam profile) Fig. 4 (a) Average output power and conversion efficiency of the ?~274 nm FHG vs. ?~548 nm power; (b) Spectrum of the ?~274 nm measured by the spectrometer (zoomed in the inset) Geographic location of data collection: University of Southampton, U.K. Related projects: Engineering and Physical Sciences Research Council (EPSRC) (EP/L01243X/1), (EP/P027644/1) Dataset available under a CC BY 4.0 licence Publisher: University of Southampton, U.K. Date: January 2018