homodyne method

The homodyne method is a technique used in physics and engineering to measure signals, especially those involving light or electromagnetic waves. It involves mixing a weak signal with a strong, reference wave called a local oscillator that has the same frequency. By doing this, the combined signal produces a measurable output that reveals information about the original signal’s amplitude and phase. This method enhances detection sensitivity and allows precise measurement of signal properties, making it essential in applications like quantum optics, communications, and signal processing.