@ARTICLE{journals/Sensors/MathewHSKPHMHLSKM17, title = {Integrating fibre Fabry-Perot cavity sensor in to 3D printed metal components for extreme high temperature monitoring applications}, author = {Jinesh Mathew and Carl Hauser and Philipp Stoll and Christoph Kenel and Dimitros Polyzos and Dirk Havermann and William MacPherson and Duncan Hand and Christian Leinenbach and Adriaan B. Spierings and Kamilla Koenig-Urban and Robert Maier}, booktitle = {Sensors}, language = {English}, year = {2017}, volume = {n.a.}, pages = {8}, keywords = {Additive layer manufacturing; Fabry-Perot cavity; fibre optic sensor; selective laser melting; sensor packaging; smart metal; temperature senso}, abstract = {This paper reports methods of embedding into 3D printed metal components a fused silica capillary designed to accept an in-fibre Fabry-Perot cavity based extreme high temperature sensor. The components are manufactured in stainless steel (SS316) by additive manufacturing using selective laser melting (SLM). The temperature sensor consists of a standard single mode optical fibre with the F-P sensor located at the distal end of the fibre with the fibre being inserted into the capillary. The capillary is either directly embedded into the structure during the SLM build process or brazed into the structure in between the SLM build process and the advantages and disadvantages of these two manufacturing approaches are discussed. Temperature sensing of up to 1000°C inside the metal with accuracy better than _10°C is reported. The capillary can be directly embedded in the component which needs to be monitored, or it can be embedded in a metal coupon which can be attached to a component by conventional welding technology, including the use of Laser Metal Deposition (LMD). In the case of LMD, the sensor coupon can also be fully encapsulated by over cladding the coupon.} }