Chirped fiber Bragg gratings written with ultrashort pulses and a tunable phase mask.
We report a fabrication technique for chirped fiber Bragg gratings (CFBGs) using a flexible setup based on a poly(methyl-methacrylate) phase mask. The period of the phase mask can be thermally tuned during the inscription process, allowing the grating period of uniform fiber Bragg gratings to be shifted about 7 nm by a temperature change of 74 K. In addition, CFBGs with bandwidths up to 2 nm are demonstrated in non-photosensitive fibers by IR femtosecond inscription.
Voigtländer
Christian
C
Institute of Applied Physics, Friedrich-Schiller-University Jena, Max-Wien-Platz 1, D-07743 Jena, Germany. ch.voigtlaender@uni-jena.de
Thomas
Jens
J
Wikszak
Elodie
E
Dannberg
Peter
P
Nolte
Stefan
S
Tünnermann
Andreas
A