Distributed Fiber Optic Sensors for Space-Based Nuclear Reactors

Luna Innovations has successfullly completed all of the Phase I objectives. A Distributed Grating Demodulation System (DGDS) was constructed and tested using radiation-resistant fiber. Temperatue sensors were produced and calibrated. Two housings were constructed that allow an all-welded pressure boundary penetration. Radiation testing was successfully conducted on sensing fiber in a combined high-neutron and gamma environment. The key technological advantage offered by the sensors developed under this program is their ability to be highly multiplexed, allowing the placement of literally thousands of sensors along a single optical fiber. There are three strategic objectives for the Phase II: 1) Fully validate the DGDS technology for space reactor applications, 2) Expand the application base for DGDS sensor technology, and 3) Develop strategy for commercial development. The primary objective is to finalize sensor designs using specifications obtained from NASA and industry partners so that prototypes can be constructed. Resolving high temperature operation is a major portion of this objective. The application base will be expanded by designing sensors that can measure temperature, strain, pressure, and flow. Luna has an extremely successful track record in commercial development, having spun off four successful companies dedicated to the commercialization of technologies developed at Luna Innovations.