Porous graphite samples were irradiated with up to and 1 MJ deposited energy from a continuous wave ytterbium fiber laser. Visible emission spectroscopy reveals Swan () , and 0 sequences, CN red () sequences, CN violet () sequences, and Li, Na, and doublets. Surface temperatures increased from at to at . Spectral emissivity at ranging from 0.74 to 0.93 increases by after laser irradiation. Spectral simulations demonstrate that the ratio of and column densities are independent of sample porosity. Column densities increase from 0.00093 to for and 0.00014 to for as laser intensity increases from 1.4 to . Surface temperatures increase by 134 K and and emissions increase by 100% and 4200%, respectively, in stagnation air flow of .