Which of the following is NOT a wavelength used in fiber optic communication systems?

In fiber optic communication systems, specific wavelengths are predominantly used for transmitting data. The common wavelengths include 850 nm, 1300 nm, and 1550 nm. These wavelengths are chosen based on various factors, including the attenuation characteristics of the fiber, the type of light sources (such as LEDs or lasers) that can be used, and the overall performance requirements for long-distance communication.

When it comes to the 1800 nm option, this wavelength is not typically utilized in standard fiber optic communication systems. Instead, it lies outside the commonly adopted ranges for most fiber optic transmissions, which generally focus on the aforementioned wavelengths due to their efficiency in minimizing signal loss and enhancing transmission distances.

Understanding these wavelength ranges is important for those working with fiber optics, as they influence the design and performance of communication networks.