 Potential uses cited in the references below include fabricating many, possibly hundreds of hybrid silicon lasers on a die and using silicon photonics to combine them together to form high bandwidth optical links for personal computers, servers or back planes.These lasers are now fabricated on 300 mm silicon wafers in CMOS foundries in volumes of over one million per year.The low loss of silicon waveguides means these lasers can have very narrow linewidths (<1 kHz) which opens up new applications such as coherent transmitters, optical LIDARs, optical gyroscopes, and other applications.These lasers can be used to pump nonlinear devices to make optical synthesizers with a stability of 1 part in 1017.