High-precision light sources, such as lasers, are essential for many applications, including atomic clocks, GPS, quantum computing, and microwave generation. It’s becoming increasingly important to understand the fundamental limits of how stable and low noise these light sources can be. In this project, the noise properties of a special light source known as an optical parametric oscillator will be investigated using light cavities, known as microresonators, fabricated in photonic chips. The goal is to determine if the standard quantum noise limit in these light oscillators can be surpassed, which would allow for even greater precision and stability than was thought possible. Such sources will further enhance the performance of applications, such as quantum networking, in quantum information science and technology (QIST). Additionally, the project will provide for the training of undergraduate and graduate students in the important field of QIST. Members of the research team will also perform outreach to middle- and high-school students on topics in optics and quantum information processing. Coherent optical sources are a critical part of experimental atomic, molecular, and optical physics. These sources include lasers, optical parametric oscillators, and optical frequency combs. As researchers push the limits of experimental precision and complexity, understanding the ultimate quantum limits of these sources is essential. Furthermore, as experimental setups become increa