integrated squeezed light sources for photonic quantum computing

Within our work we combine periodically poled thin-film lithium niobate waveguides with large bandwidth polymer fiber-to-chip couplers in order to realize integrated squeezed light sources . Different design approaches based on periodically poled lithium niobate for spontaneous parametric down conversion and micro-ring resonators are discussed. Their characteristics are compared regarding reproducibility, fabrication complexity alongside with their performance in terms of squeezing level, threshold power and scalability. The as presented platform for squeezed light sources has the capability for versatile, low-loss integrated squeezers with squeezing levels >10dB. Additionally, the ability to simultaneously achieve high coupling efficiency to optical fibers via the use of polymer couplers holds great promise for large-scale CV quantum computing via time-multiplexing.