Optical Engineering: Interference Filters and Wave Beats

This lecture by Olivier J.F. Martin from EPFL's Laboratory of Nanophotonics and Metrology covers the principles of interference filters, including the interference effects based on the thickness and refractive index of glass plates. It also delves into wave beats, discussing the superposition of waves with different frequencies and the generation of short temporal pulses through spectral broadening. Additionally, the lecture explores the dispersion of materials in optics, focusing on the refractive index variation with wavelength and the impact of dispersion on signal transmission, especially with short pulses.