TITLE:
Fiber Optic Sensors and Sensor Networks Using a Time-domain Sensing Scheme
AUTHORS:
Chuji Wang, Malik Kaya, Peeyush Sahay, Haifa Alali, Robert Reese
KEYWORDS:
Fiber Loop Ringdown; Structural Health Monitoring; Water, Crack, and Temperature Sensing; Sensor Network
JOURNAL NAME:
Optics and Photonics Journal,
Vol.3 No.2B,
July
22,
2013
ABSTRACT:
Fiber loop ringdown (FLRD) has demonstrated to be
capable of sensing various quantities, such as chemical species, pressure,
refractive index, strain, temperature, etc.; and it has high potential for the
development of a sensor network. In the present work, we describe design and
development of three different types of FLRD sensors for water, cracks, and
temperature sensing in concrete structures. All of the three aforementioned
sensors were indigenously developed very recently in our laboratory and their
capabilities of detecting the respective quantities were demonstrated. Later,
all of the sensors were installed in a test grout cube for real-time
monitoring. This work presents the results obtained in the laboratory-based
experiments as well as the results from the real-time monitoring process in the
test cube.