At the second harmonic, the single-mode Q-switched laser exhibits a spectral width of 45 MHz during a measurement time of 11 ms and a long-term spectral width of 75 MHz that is broadened by vibrations and the modulation of the cavity length for the stabil

A photon pair source that can bridge the visible and telecom bands could be useful for transporting quantum communications over optical fibers. However, the optical components that store and process quantum information typically require visible-light phot