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Variable wavefront tuning with a SLM for tailored femtosecond fiber Bragg grating inscription

 
: Voigtlander, C.; Krämer, R.G.; Goebel, T.A.; Richter, D.; Nolte, S.

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Optics Letters 41 (2016), No.1, pp.17-20
ISSN: 0146-9592
Bundesministerium für Wirtschaft und Technologie BMWi
KF3207604DF4
English
Journal Article
Fraunhofer IOF ()

Abstract
We report on the inscription of fiber Bragg gratings using femtosecond laser pulses and the phase-mask technique. The wavefront of the inscription laser is variably tuned with a spatial light modulator (SLM). By applying Fresnel lenses with different focal lengths, the period of the fiber Bragg gratings could be shifted. A linear change of the grating period for a FBG inscribed with a third-order deformed wavefront and a quadratic-period behavior for a fourth-order wavefront could be verified experimentally for the first time.

: http://publica.fraunhofer.de/documents/N-382251.html