Abstract

We report the fabrication of a π-phase-shifted long-period fiber grating (LPFG) capable of operating as a terahertz-bandwidth second-order temporal differentiator. We demonstrate its operation experimentally by differentiating subpicosecond long optical pulses. A new scheme for achieving high-order photonic temporal differentiation based on LPFG filters is also proposed and demonstrated. In particular, we prepared a LPFG-based first-order differentiator that was frequency and bandwidth matched to the second-order device and demonstrated the cascadability of these devices leading to the implementation of a third-order differentiator. By also employing these devices in reflection, up to the fifth-order differentiation is demonstrated experimentally.

© 2009 Optical Society of America

Design of terahertz-bandwidth arbitrary-order temporal differentiators based on long-period fiber gratings

Mykola Kulishov, David Krcmarík, and Radan Slavík
Opt. Lett. 32(20) 2978-2980 (2007)

Experimental demonstration of ultrafast all-fiber high-order photonic temporal differentiators

Luis M. Rivas, Sylvain Boudreau, Yongwoo Park, Radan Slavík, Sophie LaRochelle, Alejandro Carballar, and José Azaña
Opt. Lett. 34(12) 1792-1794 (2009)

First-order loss-less differentiators using long period gratings made in Er-doped fibers

David Krčmařík, Radan Slavík, Yongwoo Park, Mykola Kulishov, and José Azaña
Opt. Express 17(2) 461-471 (2009)

Design of high-order all-optical temporal differentiators based on multiple-phase-shifted fiber Bragg gratings

Mykola Kulishov and José Azaña
Opt. Express 15(10) 6152-6166 (2007)

Long-period fiber gratings as ultrafast optical differentiators

Mykola Kulishov and José Azaña
Opt. Lett. 30(20) 2700-2702 (2005)