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  • CLEO/Europe and EQEC 2011 Conference Digest
  • OSA Technical Digest (CD) (Optica Publishing Group, 2011),
  • paper CJ10_1

Femtosecond laser induced fiber Bragg gratings in active and multi mode fibers

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Active Yb-doped large mode area (LMA) fibers allow for power scaling of lasers with excellent beam quality up to the kW regime [1]. However, the demand for compact, robust and cheap high power sources pushes research towards integrated, monolithic fiber setups. Most prominently, intra-core cavity mirrors can be realized with fiber Bragg gratings (FBG). However, in contrast to single mode fibers, FBGs in large core few mode fibers are challenging for two reasons: Firstly, conventional fabrication of FBGs in fibers with large cross-section is time-consuming and costly. Secondly, multimode interaction in few mode fibers leads to modal instabilities and polarization effects [2].

© 2011 Optical Society of America

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