What is the typical wavelength for multimode fiber optics?

The typical wavelength for multimode fiber optics is 850 nm and 1300 nm. These wavelengths are specifically suited for multimode fiber due to the design and performance characteristics of the fibers typically used in this application.

At 850 nm, multimode fiber can efficiently transmit data with less signal attenuation, making it ideal for short-distance applications such as within a building or data center. The 1300 nm wavelength is also used because it provides better performance over slightly longer distances than the 850 nm wavelength due to reduced modal dispersion, allowing for higher bandwidth and improved data integrity over longer runs in a multimode fiber environment.

The other wavelength ranges provided in the options are not associated with multimode fiber. Wavelengths like 1310 nm and 1550 nm are mainly used in single-mode fiber optics, which are optimized for long-distance transmission. The wavelengths 400 nm and 500 nm are not typical for fiber optics as they fall within the visible light spectrum and are generally too short for effective data transmission in optical fibers. The range of 1550 nm to 1800 nm is also outside the norms for multimode applications and is generally utilized in other specialized optical applications.