https://ee.iitm.ac.in/optics/ 2026-04-04T09:44:39+0530 https://ee.iitm.ac.in/optics/ https://ee.iitm.ac.in/optics/lib/tpl/starterbootstrap/images/favicon.ico text/html 2019-03-06T10:34:15+0530 Anonymous (anonymous@undisclosed.example.com) https://ee.iitm.ac.in/optics/doku.php?id=photonics:research:fos:dfs&rev=1551848655&do=diff Distributed Fiber Sensors Structural health monitoring (SHM) has become an essential part of capital-intensive structures such as bridges, dams, oil/gas pipelines and aircraft for early detection of abnormalities thereby reducing maintenance cost and extending their lifetime. Monitoring of strain and temperature are quite helpful for SHM of these structures. Distributed sensors are advantageous to monitor these large structures. Optical fiber based sensors are capable of distributed sensing whe… text/html 2019-03-14T10:48:13+0530 Anonymous (anonymous@undisclosed.example.com) https://ee.iitm.ac.in/optics/doku.php?id=photonics:research:fos:fbg&rev=1552540693&do=diff Fiber Bragg Grating Sensors Grating Fabrication Facility We are using in-house fabricated FBGs for our research purpose. In Grating Fabrication facility, Phase mask technique is used to fabricate the FBGs with different Bragg wavelengths such as 650 nm, 1060 nm, and different Bragg wavelengths in between 1530-1575 nm. FBG is fabricated by placing photosensitive fiber after Phase mask and illuminating with excimer Laser having a wavelength of 248 nm