Frequency comb generation

Frequency comb generation involves producing a spectrum of equally spaced, sharp light frequencies—like evenly spaced rungs on a ladder—that can be used for precise measurement and calibration. This is achieved by sending laser pulses into a special medium, causing the light to interfere and create multiple new colors (frequencies). These "comb" lines are stable and precise, enabling advances in areas such as atomic clocks, spectroscopy, and quantum computing. Essentially, a frequency comb acts as a highly accurate ruler in the frequency domain, allowing scientists to measure and compare electromagnetic waves with remarkable precision.