Continuously chirped fiber Bragg gratings by femtosecond laser structuring.
We report on what we believe to be the first successful inscription of continuously chirped fiber Bragg gratings (CCFBG) into a nonphotosensitive single-mode fiber (SMF) with near-IR femtosecond laser pulses. The continuous chirp was achieved by inscribing into a bent fiber using a phase mask scanning technique. We fabricated a 20 mm long CCFBG with a bandwidth of 6 nm and a maximal reflectivity of 50%. The second-order dispersion of the CCFBG of up to 28 ps(2) was measured with spectral interferometry.
Thomas
Jens
J
Institute of Applied Physics, Friedrich-Schiller-University, Jena, Germany. thomas@iap.uni-jena.de
Voigtländer
Christian
C
Schimpf
Damian
D
Stutzki
Fabian
F
Wikszak
Elodie
E
Limpert
Jens
J
Nolte
Stefan
S
Tünnermann
Andreas
A