Abstract
A regenerated optical fibre Bragg grating that survives temperature cycling up to 1,295°C is demonstrated. A model based on seeded crystallisation or amorphisation is proposed.
Highlights
We have reported for the first time regenerated fibre Bragg gratings in standard photosensitive boron codoped germanosilicate optical fibre that approach 10% transmission [1, 2]
Regenerated Bragg gratings are gratings that have grown through thermal processing at high temperatures (~900oC) after the seed grating written by UV light is erased
In this report, using a modified ultra high temperature micro heater we demonstrate that these types of gratings can operate as high as 1,295°C
Summary
We have reported for the first time regenerated fibre Bragg gratings in standard photosensitive boron codoped germanosilicate optical fibre that approach 10% transmission [1, 2]. Such ultra high temperature gratings are extremely important for high temperature monitoring applications including high power fibre laser operation and numerous applications in the mining and energy industries. High temperature industrial processing of materials such steel and aluminium in smelters, can benefit from greater power consumption efficiencies if temperatures above 1,000°C are able to be monitored. Sensors 2008, 8 with no evidence of any decay after cycling This record temperature means these gratings can even outperform the optical fibre itself, which has become brittle. Even when the fibre breaks into pieces the grating remains intact. An alternative model based on crystallisation (or amorphisation) of the vitreous state is proposed
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
