High-order passive photonic temporal integrators.
We experimentally demonstrate, for the first time to our knowledge, an ultrafast photonic high-order (second-order) complex-field temporal integrator. The demonstrated device uses a single apodized uniform-period fiber Bragg grating (FBG), and it is based on a general FBG design approach for implementing optimized arbitrary-order photonic passive temporal integrators. Using this same design approach, we also fabricate and test a first-order passive temporal integrator offering an energetic-efficiency improvement of more than 1 order of magnitude as compared with previously reported passive first-order temporal integrators. Accurate and efficient first- and second-order temporal integrations of ultrafast complex-field optical signals (with temporal features as fast as approximately 2.5ps) are successfully demonstrated using the fabricated FBG devices.
Asghari
Mohammad H
MH
Institut National de la Recherche Scientifique-Energie, Matériaux et Télécommunications (INRS-EMT),Montréal, Québec, H5A 1K6 Canada. asghari@emt.inrs.ca
Wang
Chao
C
Yao
Jianping
J
Azaña
José
J