Readme As per RCUK data research management requirements, we have deposited the raw data for the figures in the paper, “Temperature-dependent spectroscopy and microchip laser operation of Nd:KGd(WO4)2” by P. Loiko, S.J. Yoon, J.M. Serres, X. Mateos, S.J. Beecher, R.B. Birch, V.G. Savitski, A.J. Kemp, K. Yumashev, U. Griebner, V. Petrov, M. Aguiló, F. Díaz and J.I. Mackenzie. The excel spreadsheet is arranged such that each new sheet corresponds to each figure in the paper, with the title of each column in the first row, with the corresponding units in the second row and a comment about the data in the third row. If there are any queries about the data, these can be addressed to the corresponding author of the paper.