Frequency combs in optically-injected terahertz ring quantum cascade lasers
Abstract
Quantum cascade lasers (QCLs) have emerged as promising candidates for generating chip-scale frequency combs in mid-infrared and terahertz wavelengths. In this work, we demonstrate frequency comb formation in ring terahertz QCLs using the injection of light from a distributed feedback (DFB) laser. The DFB design frequency is chosen to match the modes of the ring cavity (near 3.3 THz), and light from the DFB is injected into the ring QCL via a bus waveguide. By controlling the power and frequency of the optical injection, we show experimentally and theoretically that combs can be selectively formed and controlled in the ring cavity. The potential for soliton generation and efficient power extraction through the bus waveguide presents exciting opportunities for integrating this technology in compact comb designs.
Cite
@article{arxiv.2308.11851,
title = {Frequency combs in optically-injected terahertz ring quantum cascade lasers},
author = {Md Istiak Khan and Zhenyang Xiao and Sadhvikas J. Addamane and David Burghoff},
journal= {arXiv preprint arXiv:2308.11851},
year = {2023}
}
Comments
15 pages, 4 figures