Integrating Fiber Fabry-Perot Cavity Sensor into 3-D Printed Metal Components for Extreme High-Temperature Monitoring Applications

Jinesh Mathew*, Carl Hauser, Philipp Stoll, Christoph Kenel, Dimitrios Polyzos, Dirk Havermann, William N. Macpherson, Duncan Paul Hand, Christian Leinenbach, Adriaan Spierings, Kamilla Koenig-Urban, Robert Raimund Josef Maier

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)
168 Downloads (Pure)


This paper reports the methods of embedding into 3-D printed metal components a fused silica capillary designed to accept an in-fiber 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 fiber with the F-P sensor located at the distal end of the fiber with the fiber 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 an 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.

Original languageEnglish
Pages (from-to)4107-4114
Number of pages8
JournalIEEE Sensors Journal
Issue number13
Early online date10 May 2017
Publication statusPublished - 1 Jul 2017


  • Additive layer manufacturing
  • Fabry-Perot cavity
  • fiber optic sensor
  • selective laser melting
  • sensor packaging
  • smart metal
  • temperature sensor

ASJC Scopus subject areas

  • Instrumentation
  • Electrical and Electronic Engineering


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