High temperature long period grating thermo-mechanically written
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An optical fiber transducer able to work in high temperature environments is
experimentally demonstrated in the laboratory. It is based on a permanent long period
grating (LPG) written using a new technique based on a thermo-mechanical approach.
Device precision was experimentally checked by means of repetitive thermal cycles
between 25 and 950 ºC. In addition device stability was assured by maintaining the
temperature in steady state at 800 ºC during 23 hours.
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