Optical fibers are small-in-diameter, light-in-weight, electromagnetic-interference immune, electrically passive,
chemically inert, flexible, embeddable into different materials, and distributed-sensing enabling, and can be temperature
and radiation tolerant. With appropriate processing and/or packaging, they can be very robust and well suited to
demanding environments. In this paper, we review a range of complete end-to-end fiber optic sensor systems that IFOS
has developed comprising not only (1) packaged sensors and mechanisms for integration with demanding environments,
but (2) ruggedized sensor interrogators, and (3) intelligent decision aid algorithms software systems. We examine the
• Fiber Bragg Grating (FBG) optical sensors systems supporting arrays of environmentally conditioned multiplexed
FBG point sensors on single or multiple optical fibers: In conjunction with advanced signal processing, decision aid
algorithms and reasoners, FBG sensor based structural health monitoring (SHM) systems are expected to play an
increasing role in extending the life and reducing costs of new generations of aerospace systems. Further, FBG
based structural state sensing systems have the potential to considerably enhance the performance of dynamic
structures interacting with their environment (including jet aircraft, unmanned aerial vehicles (UAVs), and medical
or extravehicular space robots).
• Raman based distributed temperature sensing systems: The complete length of optical fiber acts as a very long
distributed sensor which may be placed down an oil well or wrapped around a cryogenic tank.