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Opt Lett. 2006 Jun 1;31(11):1603-5.

Direct inscription of Bragg gratings in coated fibers by an infrared femtosecond laser.

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  • 1Photonics Research Group, Electronic Engineering, Aston University, Birmingham, UK.


Inscription of fiber Bragg gratings through the coating of a nonphotosensitized standard telecommunication fiber is demonstrated for what is believed to be the first time. Highly reflective gratings were produced by direct point-by-point writing with an infrared femtosecond laser. The length of the gratings presented ranged from 5 to 26 mm. The technique does not require a special coating, as standard coatings are transparent to infrared radiation. Inscription through the coating improves the mechanical strength of the processed segment of fiber.

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