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  • CLEO/Europe and IQEC 2007 Conference Digest
  • (Optica Publishing Group, 2007),
  • paper CJ6_1

Femtosecond written fiber gratings in PM and LMA fibers

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Abstract

Fiber gratings allow in-line spectral control of the guided light and can be used as narrow-band reflectors or for the selective coupling of light into other existing fiber modes. Within the past such gratings have been mainly fabricated with cw-UV-Lasers in photosensitive material. However, fibers used in “state of the art”- fiber lasers possess material properties and geometries that make it difficult or impossible to inscribe gratings with this technique. These difficulties can be overcome by techniques that rely on the refractive index change caused by nonlinear absorption of focused femtosecond pulses.

© 2007 IEEE

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