Open AccessHighly sensitive ultrafast pulse characterization using hydrogenated amorphous silicon waveguides
Author(s) -
Keith G. Petrillo,
Ke-Yao Wang,
Amy C. Foster,
Mark A. Foster
Publication year - 2013
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.21.031229
Subject(s) - ultrashort pulse , optics , four wave mixing , materials science , second harmonic generation , silicon , nonlinear optics , characterization (materials science) , amorphous silicon , optoelectronics , physics , laser , crystalline silicon
We experimentally demonstrate frequency resolved optical gating (FROG) via four-wave mixing (FWM) in ultrahigh nonlinearity hydrogenated amorphous silicon waveguides. We demonstrate FROG characterization using a FWM architecture that mimics second harmonic generation (SHG) FROG for pulsewidths as low as 360 fs. Additionally, we demonstrate for the first time a FWM architecture analogous to third harmonic generation (THG) FROG and validate its ability to overcome the direction of time ambiguity of the SHG-like architecture. Both architectures allow for sensitivities suitable for future telecommunications signals.