Terahertz bandwidth integrated radio frequency spectrum analyzer via nonlinear optics

摘要

We report an integrated all-optical radio frequency spectrum analyzer basedon a ~ 4cm long doped silica glass waveguide, with a bandwidth greater than 2.5THz. We use this device to characterize the intensity power spectrum ofultrahigh repetition rate mode-locked lasers at repetition rates up to 400 GHz,and observe dynamic noise related behavior not observable with othertechniques.