A supercontinuum light source was incorporated into a custom-built scanning white-light interferometer. This light source based on a Nd:YAG pumped microstructured optical fiber exhibits $1.21\pm 0.10\mu \mathrm{m}$ temporal coherence length. The device operation was validated by characterizing the step height on a microelectromechanical system component. The measured step height— $7.027\pm 0.020\mu \mathrm{m}$ —agreed with results obtained by employing traditional light sources: a halogen lamp and a white light-emitting diode. The new light source features high output intensity of $20–35\mathrm{mW}$ , which is beneficial when measuring low-reflectivity samples. As the supercontinuum light source may be modulated at frequencies exceeding $10\mathrm{MHz}$ , it holds potential for stroboscopic dynamic measurements.