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Project TitleSuperstructure fiber Bragg grating sensors
Track Code8810-7267
Short Description

Researchers at the University of Waterloo have created an Optical Sensor capable of simultaneously detecting Temperature and Pressure.

The fiber optic sensor utilizes a special on-fiber thin coating to allow for this multiple simultaneous measurement. This optical sensor also only requires one end to be attached to a light source and measurement tool instead of both ends as is typically required. The sensor utilizes light instead of electricity and hence is not affected by magnetic fields and can be utilized in a wide variety of environments where using electrical components may be dangerous.

Tagsoptical sensor, fibre Bragg coating, fibre sensor, fiber Bragg grating, superstructure fiber Bragg grating, multi-parameter measurements
Posted DateAug 31, 2010 11:45 AM


Scott Inwood


There are many situations where it is necessary to know the simultaneous temperature and pressure of an object. One example would be the temperature and pressure of a bridge. For reasons of public safety, Engineers would need to know and monitor the strain a bridge is facing and its temperature. If the temperature drops too low, then the bridge may ice over, causing dangerous driving conditions. If the bridge experiences very high levels of strain, then it may collapse. Currently the only way to obtain this information is with a series of different sensors. These multiple sensors each require their own monitoring equipment and as a result are costly. A single sensor capable of simultaneously measuring temperature and pressure would be more efficient and economical.

Potential Applications

  • These optical sensors may be utilized in buildings and bridges, tools (i.e. drilling tools for the oil industry, moulds and dies), medical sensors for in-vitro and in-vivo studies, aeronautical sensors (i.e. airplane wings and fuselage), etc.
  • These optical sensors can be very short or as long as several kilometres and still detect where along their length a specific temperature and pressure are occurring. They are lightweight and small with about 150 micron diametrical feature.


Ehsan Toyserkani
Hamidreza Alemohammad 

Patent Status

PCT Nationalized in U.S., Canada, Europe and China

Stage of Development

Working prototype developed and tested