This is a restart of last years CIF that had to be terminated early. This effort will rigorously study ultrafast laser welding and develop the techniques for reliably performing a weld of Glass to Glass, Glass to Metal, or Glass to Ceramic, such as the case for a thermoelectric cooler. Potential applications will include welding a glass optic to a metal mount, glass optics to ceramic sample, and connecting optical fiber to a collimator. Additionally, the team will investigate the techniques for writing a waveguide inside a glass sample, and look at the factors that influence waveguide loss. Once this effort has been fully demonstrated, future HQ funding opportunities such as ESTO’s ACT, IIP, EVIs, EVM’s, Planetary Sciences’ PIDD, MatiSSE, etc. will be pursued.