title: All-fiber tunable optical delay line.
abstract: We present a tunable optical delay line based on the use of a single chirped fiber Bragg grating written into a standard single mode optical fiber. In the proposed scheme, the delay is induced through the Bragg grating differential group delay curve. This is achieved by launching orthogonally polarized optical pulses in both directions into the Bragg grating and by controlling its local birefringence. This bidirectional propagation allows to compensate the second-order dispersion. The setup is suitable to delay pulses with a spectral width just less than the grating reflection bandwidth, which is particularly useful in the context of forthcoming wavelength division multiplexing ultra-high bit rate lightwave systems. In this work, the performances of the setup are investigated using a pulsed laser delivering 6.3 ps Fourier transform limited pulses at 1548 nm. A maximum delay of 120 ps (about 20 times the pulse width) is reported experimentally.
authors.affiliation: Laboratoire PhLAM, UMR CNRS 8523, IRCICA, FR CNRS 3024, Université Lille 1, 59655 Villeneuve d'Ascq, France. christophe.caucheteur@umons.ac.be
authors.forename: Christophe
authors.initials: C
authors.lastname: Caucheteur
authors.forename: Arnaud
authors.initials: A
authors.lastname: Mussot
authors.forename: Sébastien
authors.initials: S
authors.lastname: Bette
authors.forename: Alexandre
authors.initials: A
authors.lastname: Kudlinski
authors.forename: Marc
authors.initials: M
authors.lastname: Douay
authors.forename: Eric
authors.initials: E
authors.lastname: Louvergneaux
authors.forename: Patrice
authors.initials: P
authors.lastname: Mégret
authors.forename: Majid
authors.initials: M
authors.lastname: Taki
authors.forename: Miguel
authors.initials: M
authors.lastname: Gonz Lez-Herrāez