Université Laval

Published purpose

The Project addresses the critical need for ultraprecise timing and synchronization in PNT sectors. The objective is to develop a new class of semiconductor lasers capable of generating optical frequency combs alongside squeezed quantum states of light. High-precision timing and synchronization are essential for navigation, communications, defense, and industrial metrology systems. Although current optical comb-based synchronizers can achieve femtosecond-level precision, their performance is ultimately constrained by shot noise, especially over long-distance fiber links. Quantum-squeezed light can overcome these noise limits, offering a pathway to even higher timing accuracy. However, existing squeezed-light source remain impractical for field deployment due to their large size, complexity, fragility and incompatibility with large-scale integration. The Project's solution involves embedding an InAs/InP quantum-dot gain medium into our uniquely customized laser cavity structures. These materials enable ultrafast carrier dynamics and inherently low phase noise,both of which are essential for generating nonlinear optical effects such as four-wave mixing and Kerr-induced comb formation. To enhance device performance, the Project designs multifunctional thin-film coatings on the laser facets that simultaneously control reflectivity and manage dispersion.This engineered dispersion supports phase matching, enabling efficient generation of frequency combs with quadrature-squeezed light directly on a chip. By leveraging the NRC's expertise in quantum dot coherent comb laser development and Laval University, Prof. Grillot's recent achievements in nonlinear photonics and non-classical light generation, the Project establishes a clear path toward prototype demonstration. Potential beneficiaries include providers of navigation and quantum-secured internetworking seeking ultra-stable timing; autonomous vehicle and defense systems requiring high-precision ranging; and industrial and environmental monitoring sectors that demand compact, multi-parameter sensors. The Project will catalyze a shift from laboratory-based quantum optics to ubiquitous, high-impact (TRL 6) applications. It aligns directly with Canada's National Quantum Strategy and strengthens the country's leadership in next-generation metrology and quantum enabled innovation.