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Indian Institute of Technology Madras

Optical Fiber Sensors

Indian Institute of Technology Madras and NPTEL via Swayam


Optical Fiber Sensors is intended as a senior undergraduate / graduate level course that introduces the different types of optical sensor technologies and their applications in metrology, navigation, and structural health monitoring. The learning objectives of the course include:
• Identify different types of optical sensors and their performance characteristics
• Analyze a given sensing requirement and design appropriate sensor
• Realize and implement an optimal sensing solution for a given requirement
Final year UG, and PG students including MS/PhD studentsPREREQUISITES : Introduction to Photonics (preferable)INDUSTRIES SUPPORT :Sterlite Technologies, SFO Technologies, TAG, Forbes Marshall



Week 1-2:• Why optical sensors? o Different types Sensors & Instrumentation metrics
o Optical receiver design; noise issues Week 3-4:• Amplitude Modulated sensors
o Lock-in detection
Week 5-6:• Phase modulated sensors
o Phase noise analysis and mitigation; Sensitivity limits Week 7-8:•Wavelength modulated sensors
o Interrogator design, sensitivity limits
Week 9:• Polarization Modulated Sensors
o Analysis of current sensor Week 10-12:• Distributed Fiber Sensors
o Raman & Brillouin scattering-based sensors

Taught by

Prof. Balaji Srinivasan

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