Integrated optical parametric amplifiers in silicon nitride waveguides incorporated with 2D graphene oxide films
Résumé
Optical parametric amplification (OPA) represents a powerful solution to achieve broadband
amplification in wavelength ranges beyond the scope of conventional gain media, for generating
high-power optical pulses, optical microcombs, entangled photon pairs and a wide range of other
applications. Here, we demonstrate optical parametric amplifiers based on silicon nitride (Si3N4)
waveguides integrated with two-dimensional (2D) layered graphene oxide (GO) films. We achieve
precise control over the thickness, length, and position of the GO films using a transfer-free, layer-
by-layer coating method combined with accurate window opening in the chip cladding using
photolithography. Detailed OPA measurements with a pulsed pump for the fabricated devices with
different GO film thicknesses and lengths show a maximum parametric gain of ~24.0 dB,
representing a ~12.2 dB improvement relative to the device without GO. We perform a theoretical
analysis of the device performance, achieving good agreement with experiment and showing that
there is substantial room for further improvement. This work represents the first demonstration of
integrating 2D materials on chips to enhance the OPA performance, providing a new way of
achieving high performance photonic integrated OPA by incorporating 2D materials
| Origine | Fichiers produits par l'(les) auteur(s) |
|---|