title: High temperature long period grating thermo-mechanically written.
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 °C. In addition device stability was assured by maintaining the temperature in steady state at 800 °C during 23 hours.
authors.affiliation: Photonics 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.).
authors.forename: Jose Miguel
authors.initials: JM
authors.lastname: Lazaro
authors.forename: Antonio
authors.initials: A
authors.lastname: Quintela
authors.forename: Jose Miguel
authors.initials: JM
authors.lastname: Lopez-Higuera