Description: Wavelength modulation in multimodal systems is a technique that adjusts the wavelength of signals to optimize data transmission in environments where multiple propagation modes can coexist. This technique is essential in optical communication, where signals of different wavelengths can be multiplexed to increase system capacity. By modulating the wavelength, it allows multiple signals to travel simultaneously through the same medium, such as an optical fiber, without significant interference between them. This is achieved through the use of devices that can change the wavelength of the signal in real-time, allowing for better integration and efficiency in data transmission. Wavelength modulation not only enhances the capacity of communication systems but also optimizes spectrum usage, enabling a higher density of information in a limited space. This technique is fundamental in the evolution of modern telecommunications networks, where the demand for bandwidth continues to grow exponentially. In summary, wavelength modulation in multimodal systems is a key tool for maximizing the efficiency and capacity of contemporary communication networks.