✨ How do scientists measure extremely weak light signals?

🔎 One powerful technique is Optical Heterodyne Detection.

🪄 By mixing a weak optical signal with a strong reference laser, researchers create an interference beat signal that makes tiny frequency, phase, and amplitude changes measurable.

📝 This technique plays a central role in quantum optics, optical communication, laser metrology, and precision sensing.

#QuantumOptics #Photonics #LaserPhysics #OpticalCommunication #QuantumTechnology #ScienceCommunication

@PhysicsStation