Abstract
We present the theory of parametric amplification in coupled nonlinear waveguides considering the frequency dependency of the coupling strength. We show that coupling dispersion can indeed compensate for the uncoupled individual waveguides dispersion enabling a substantial tailoring of the gain spectrum. Our theory describes both phase-sensitive and phase-insensitive operational modes, it can be straightforwardly generalized to include arbitrary higher-order waveguide and coupling dispersion and its predictions agree very well with numerical simulations both in the presence and in the absence of waveguide losses. It provides a tool for the design of novel versatile parametric amplifiers based both on coupled integrated waveguides and dual-core fibers too.
| Original language | English |
|---|---|
| Number of pages | 6 |
| Journal | Frontiers in Photonics |
| Volume | 4 |
| Early online date | 5 Apr 2023 |
| DOIs | |
| Publication status | E-pub ahead of print - 5 Apr 2023 |
Bibliographical note
Copyright © 2023 Shi, Ribeiro and Perego. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.Keywords
- Photonics
- parametric amplification
- coupled waveguides
- coupling dispersion
- nonlinear couplers
- four wave mixing effects