https://ee.iitm.ac.in/optics/ 2026-04-04T15:57:51+0530 https://ee.iitm.ac.in/optics/ https://ee.iitm.ac.in/optics/lib/tpl/starterbootstrap/images/favicon.ico text/html 2019-01-02T11:23:48+0530 Anonymous (anonymous@undisclosed.example.com) https://ee.iitm.ac.in/optics/doku.php?id=photonics:research:metrology:fibre_interferometers&rev=1546408428&do=diff All fibre interferometer The all fibre interferometer is unique in its use of multi-wavelength fibre laser, yielding a large dynamic rangeintegrated optoelectronics and signal processingimprovements to the 3 and 4-phase stepping algorithms previously used text/html 2019-01-02T11:23:48+0530 Anonymous (anonymous@undisclosed.example.com) https://ee.iitm.ac.in/optics/doku.php?id=photonics:research:metrology:otdr&rev=1546408428&do=diff OTDR The Optical Time Domain Reflectometer is used to measure the loss along a fibre link, and locate discontinuities such as splices and connectors. We have designed multiple versions of the OTDR suitable for Long haul links - Mini OTDR - up to 130 km with 4m resolution text/html 2019-01-02T11:23:48+0530 Anonymous (anonymous@undisclosed.example.com) https://ee.iitm.ac.in/optics/doku.php?id=photonics:research:metrology:viration_sensing&rev=1546408428&do=diff Vibration sensing Sensitive detection of acoustic emissions at frequencies in the range of kHz-MHz is vital for the health monitoring of mechanical structures. Fiber Bragg gratings (FBGs) are more attractive for such application compared to conventional piezoelectric transducers (PZTs) since they provide wideband response and are amenable to array sensing