Science Daily  November 11, 2022 Integrated femtosecond pulse and frequency comb sources are critical components for a wide range of applications, including microwave photonics, communications, lidar, optical computing, and astronomy among other things. A team of researchers in the US (Harvard University, UCLA, Columbia University, industry) has demonstrated a chip-scale femtosecond pulse source implemented on an integrated lithium niobate photonic platform forming a time-lens system. The device was driven by a continuous-wave distributed feedback laser chip and controlled by a single continuous-wave microwave source without the need for any stabilization or locking. They measured femtosecond pulse trains with a 30-gigahertz […]