Abstract

Fiber Bragg gratings with greatly enhanced thermal stability have been fabricated by the use of femtosecond laser pulse irradiation on optical fibers with relaxed residual stress, through using high temperature annealing treatment. The grating reflectivity and resonant wavelength can be maintained for periods up to 20 hours using isothermal measurements and temperatures up to 1200 °C. No hysteresis was observed in the wavelength response when the gratings were annealed and the temperature cycled repeatedly between room temperature and 1200 ºC.

© 2009 Optical Society of America

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History
Original Manuscript: September 14, 2009
Manuscript Accepted: October 7, 2009
Revised Manuscript: October 6, 2009
Published: October 16, 2009

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Author Affiliations

T. Sun, K. T. Grattan

City University, U.K.

Yuhua Li, Minwei Yang, D. N. Wang

Hong Kong Polytechnic University

J. Lu

Rm FG611A, 6/F, Core G

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