Interferometers as a research area encompass the theoretical, experimental, and technological study of instruments that exploit interference of coherent waves—primarily optical, but also matter, microwave, and gravitational waves—to achieve high-precision measurement and sensing. This field investigates configuration design (e.g., Michelson, Mach–Zehnder, Fabry–Pérot), coherence and stability requirements, noise sources and mitigation, signal extraction techniques, and quantum-limited measurement strategies. Research spans applications in metrology, gravitational-wave detection, inertial sensing, spectroscopy, and fundamental tests of quantum mechanics, often integrating advanced lasers, optical cavities, photonic integration, and quantum optics (squeezed states, entanglement) to enhance sensitivity and resolution.
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