Optical frequency mixing is a process where two different light frequencies are combined to create new frequencies. This technique is commonly used in telecommunications and laser technology to generate signals at desired wavelengths. By mixing light from two sources, such as lasers, it is possible to produce new frequencies that can be used for various applications, including sensing and imaging. The mixing occurs in a nonlinear medium, where the interaction of the two light waves leads to the generation of new frequencies, known as sum and difference frequencies. This method is essential for developing advanced optical devices and enhancing the performance of fiber optic systems, enabling faster and more efficient data transmission.