This paper discusses the development, deployment and operation of the optical waveguide (OW) solar thermal power system ISRU applications at the ISRU analog test site on Mauna Kea, HI. In this solar thermal system, solar radiation is collected by the concentrator array which transfers the concentrated solar radiation to the OW transmission line made of low loss optical fibers. The OW transmission line directs the solar radiation to the place of utilization of the solar energy. In this paper applications of solar energy to sintering of native soil and thermo-chemical processing of native soil for oxygen production are discussed.