Enhanced multiplexing capacity of low-coherence reflectometric sensors with a loop topology

Libo Yuan, Wei Jin, Limin Zhou, Y.L. Hoo, M.S. Demokan
2002 IEEE Photonics Technology Letters  
A novel scheme for enhancing the multiplexing capacity of low-coherence reflectometric sensors is demonstrated. The scheme is based on connecting the sensing elements in serial in a loop configuration, allowing each of the sensors within the array being interrogated twice from opposite directions. The bi-directional interrogation enhances the multiplexing capacity in terms of maximum sensor number. The bi-interrogation scheme would also allow normal operation of the sensor array even when one
more » ... d or somewhere of the transmission fiber were broken, improving the reliability of the sensing system for large-scale structural monitoring.
doi:10.1109/lpt.2002.1022001 fatcat:52g5t52gcrgf5luwsc55wtdz64