Friday 28 March 2025
Researchers have developed a new way to generate coherent-squeezed light using a single nonlinear optical stage, which could lead to more efficient and compact devices for applications like quantum sensing and communication.
The team behind this achievement used a silicon nitride microring resonator to produce single-mode squeezed light through four-wave mixing. This process involves the interaction of three or more waves with different frequencies and phases, resulting in the creation of new light signals with unique properties.
In traditional methods, generating coherent-squeezed light requires at least two nonlinear optical stages, which can be cumbersome and prone to phase and frequency matching issues. The new approach simplifies this process by using a single stage, making it more practical for integration into photonic circuits.
The researchers’ model suggests that the microring resonator can achieve a squeezing of -4.7 dB, which is comparable to traditional methods. They also developed a theoretical framework to describe the generation of single-mode squeezing at the injection locking point of the ring resonator.
One of the key advantages of this new approach is its ability to produce squeezed light with a broad spectral bandwidth. This could be particularly useful for applications where a wide range of frequencies needs to be measured or transmitted, such as in quantum sensing and communication systems.
The team’s results also highlight the importance of considering the phase shift of the ring resonator when generating squeezed light. This phase shift can cause a rotation of the squeezing angle, which may be important for certain applications.
To illustrate these findings, the researchers calculated Wigner functions at different resonator detunings and pump powers. These functions provide a visual representation of the quadrature phases of the squeezed light, allowing the team to analyze the impact of the phase shift on the squeezing performance.
The potential implications of this research are significant. By simplifying the process of generating coherent-squeezed light, researchers may be able to develop more compact and efficient devices for quantum optics applications. This could enable new technologies like ultra-precise sensors and secure communication systems.
In the future, it will be important to experimentally verify these findings and explore ways to further optimize the performance of the microring resonator. However, the initial results are promising, suggesting that this new approach may hold significant potential for advancing our understanding and applications of quantum optics.
Cite this article: “Single-Stage Generation of Coherent-Squeezed Light for Quantum Applications”, The Science Archive, 2025.
Quantum Optics, Squeezed Light, Nonlinear Optics, Silicon Nitride Microring Resonator, Four-Wave Mixing, Coherent-Squeezed Light, Quantum Sensing, Communication Systems, Photonic Circuits, Wigner Functions.
