Nov' 2021

Optical Sensor Research team fabricates metal packaged FBG sensor probe

The Optical Sensor research group at SiliconTech has accomplished a new height by successfully fabricating the first version of the metal packaged FBG (Fiber Bragg Gratings) temperature sensor probe by embedding an FBG sensor inside a nano-composite PolydimethylSiloxane (PDMS) polymer surrounded by a stainless-steel metal probe.

The nano material used in this work is Graphene having bulk density of 0.30g/cc, average diameter of 10-15 μm, average thickness (z-direction) of 10-15 nm and purity >98%. The temperature probe is designed with a temperature sensitivity of 13 pm/°C and base wavelength of 1535nm. The real-time signal acquisition from the FBG temperature sensor probe is performed using a state-of-the-art Ibsen I-MON high-speed FBG Interrogator interfaced with the National Instruments LabVIEW application.

The Optical Sensor research group is constantly exploring new packaging and design techniques to achieve high-temperature sensing using FBGs. This research work is supported by Silicon Research Promotion Scheme (SRPS).