Regeneration, regenerated gratings and composite glass properties: the implications for high temperature micro and nano milling and optical sensing

Abstract A review of regenerated gratings and their application is presented. The relationship between new material perspectives based on the fundamental properties of amorphous structures and composite glass and the implications for practical component development is outlined. These have significant consequences on the high temperature performance possible for photonic components, such as short and long pitch fibre gratings, and call for a broader re-evaluation of fundamental fibre and waveguide design and fabrication to further optimise optical sensing and instrument technologies specifically for harsh environments such as those frequently found in the energy sector, both traditional and new. The work is even more relevant in light of global pursuits into extraterrestrial environments where extreme conditions are routinely present.