• Mr. Alex Sang
  • Luna Technologies
  • 113 McBryde Hall
  • 4:00 p.m.
  • Faculty Host: Dr. Christopher Roy

The ability to make numerous, distributed measurements in a single, standard optical fiber makes fiber-optic sensing a practical and financially attractive alternative to conventional methods.  We present a novel technique for high resolution distributed fiber-optic strain and temperature sensing based on measuring spectral shifts in the Rayleigh backscatter along an optical fiber.  High-sensitivity Optical Frequency Domain Reflectometry (OFDR) is used to measure the scatter continuously along the fiber with sub-cm spatial resolution.  Distributed measurements of strain and temperature in off-the-shelf telecommunications grade fiber are demonstrated for composite cure monitoring, wind turbine defect detection and structural health monitoring, and crack detection in concrete.  This presentation will also include a live demonstration of distributed sensing measurement on a test article.

Luna Picture
Luna Technologies, a division of Luna Innovations Incorporated, was established in 2000.  Today the company is attaining its goals of becoming a premier supplier of fiber optic test and sensing instrumentation to industry, defense agencies, government systems integrators as well as research and development customers worldwide.  Division headquarters is located at 3157 State Street in Blacksburg, Virginia.