The chalcone (2E)-1-(3-bromothiophen-2-yl)-3-(2-methoxyphenyl)prop-2-en-1-one (2M3B2SC) has been synthesised. The experimental and theoretical, IR and proton NMR spectrum have been used to confirm the structure. The absorption, transparency and optical energy gap of the molecule were experimentally determined and compare with computed TD-DFT values. The thermal stability, MEP, NBO and FMOs of the molecule have been studied. The third order NLO properties and optical limiting threshold value have been measured by Z-scan method. The dipole moment, polarizability and hyperpolarizabilty values were calculated by TDHF method. The computed, static first and second hyperpolarizabilty values are 17 and 67 times the reference urea respectively. © 2020