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Sapphire Fiber Bragg Grating Sensor Made Using Femtosecond Laser Radiation for Ultrahigh Temperature Applications

IEEE Photonics Technology Letters · 2004 · Vol. 16(11) · pp. 2505–2507

Dan Grobnic✉(Communications Research Centre Canada)Stephen J. Mihailov(Communications Research Centre Canada)Christopher W. Smelser(Communications Research Centre Canada)Huimin Ding(Communications Research Centre Canada)

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Abstract

We report for the first time the inscription of retro-reflective Bragg gratings in multimode crystalline sapphire fiber. The gratings were fabricated using 800-nm femtosecond laser radiation and a phase mask. The grating behavior was investigated up to 1500/spl deg/C with no detectable reduction in the grating reflectivity or hysteresis in the Bragg resonance. Measurements of the change in the effective index of the fiber as a function of temperature are reported and the performance of the grating as a temperature sensor is evaluated.

Advanced Fiber Optic Sensors Photonic Crystal and Fiber Optics Photonic and Optical DevicesFiber Bragg gratingMaterials sciencePHOSFOSFemtosecondOpticsGratingOptoelectronicsSapphireLong-period fiber gratingLaser

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References

Fiber grating sensors

Journal of Lightwave Technology · 1997 · 3,521 citations

Hybrid fiber Bragg grating/long period fiber grating sensor for strain/temperature discrimination

IEEE Photonics Technology Letters · 1996 · 495 citations

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