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• Quintela, A
• Lopez-Higuera, J
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• Quintela, A
• Lopez-Higuera, J
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• Lazaro, J
• Quintela, A
• Lopez-Higuera, J

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Sensors 2009, 9(7), 5649-5654; doi:10.3390/s90705649

Article

High Temperature Long Period Grating Thermo-Mechanically Written

Jose Miguel Lazaro* , Antonio Quintela and Jose Miguel Lopez-Higuera

Photonics Engineering Group, University of Cantabria, Avda. de los Castros S/N, 39005 Santander, Spain

* Author to whom correspondence should be addressed.

Received: 22 June 2009; in revised form: 7 July 2009 / Accepted: 7 July 2009 / Published: 15 July 2009

(This article belongs to the Section Physical Sensors)

Download PDF Full-Text [167 KB, uploaded 14 July 2009 17:08 CEST]

Abstract: 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.

Keywords: long period gratings; mechanical technique; fabrication; permanent LPG; high temperature sensor

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