The director of product management Sundarrajan Asokan's team worked on Fiber Bragg grating.
Vaishnavi U M
Prof. Sundarrajan Asokan | credits: IISc Bangalore
What is Fiber Bragg grating?
It is a sensor technology.
An FBG is made up of an optical fibre core. This core is surrounded by a glass cladding and is fabricated in such a way that its refractive index varies in a sinusoidal pattern across its length, with a periodicity called the pitch. While transmitting all the other wavelengths, the FBG reflects a specific wavelength of light for a particular pitch. When the pitch changes, say in response to an external stimulus like a physical strain or when there is a change in the environment due to a biological or chemical reaction of light having a different wavelength is reflected, then it can be accurately measured and calibrated to detect and quantify the external stimulus.
The device senses air pressure from patients’ exhalation and instantaneously converts it into an audible signal is an effective innovation given by him to the world.
Asokan’s research also focuses on the chalcogenide glasses which is primarily made up of sulphides, tellurides and selenides. These glasses are transparent to infrared radiation and are used in memory devices and optical amplification applications. While researching, Asokan said that we are solving a specific problem, the theoretical challenges should be considered as well.
Structural health monitoring of aircrafts, measuring blood pressure and heart rate variability, and detecting important biomarkers are the innovations developed by Asokan and his collaborators.
Hope that these innovations will be providing solutions to real world problems.
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