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High temperature long period grating thermo-mechanically written.

Jose Miguel Lazaro1, Antonio Quintela, Jose Miguel Lopez-Higuera

  • 1Photonics Engineering Group, University of Cantabria, Avda. de los Castros S/N, 39005 Santander, Spain; E-Mails: antonio.quintela@unican.es (A.Q.); miguel.lopezhiguera@unican.es (J.M.L.-H.).

Sensors (Basel, Switzerland)
|February 21, 2012
PubMed
Summary

A novel optical fiber transducer utilizing a permanent long period grating (LPG) demonstrates reliable performance in high-temperature environments up to 950°C. This device ensures precision and stability for advanced sensing applications.

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Area of Science:

  • Materials Science
  • Optical Engineering
  • Sensor Technology

Background:

  • High-temperature environments pose significant challenges for conventional optical fiber sensors.
  • Developing robust transducers is crucial for industrial monitoring and extreme condition applications.

Purpose of the Study:

  • To experimentally demonstrate a novel optical fiber transducer capable of operating in high-temperature environments.
  • To investigate the precision and stability of the proposed device under thermal stress.

Main Methods:

  • Fabrication of a permanent long period grating (LPG) using a thermo-mechanical approach.
  • Experimental validation through repetitive thermal cycling between 25°C and 950°C.
  • Assessment of device stability by maintaining a steady-state temperature of 800°C for 23 hours.
Keywords:
fabricationhigh temperature sensorlong period gratingsmechanical techniquepermanent LPG

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Last Updated: May 24, 2026

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Main Results:

  • The optical fiber transducer successfully operated in high-temperature environments.
  • The device exhibited precision during repetitive thermal cycles up to 950°C.
  • Long-term stability was confirmed at a constant 800°C for 23 hours.

Conclusions:

  • The thermo-mechanical approach enables the creation of robust permanent long period gratings for high-temperature applications.
  • The demonstrated optical fiber transducer offers a reliable sensing solution for extreme thermal conditions.
  • This technology has potential for use in demanding industrial and scientific fields.