What wavelength range is used for video distribution in broadband PON access systems?

The wavelength range used for video distribution in broadband Passive Optical Network (PON) access systems is indeed in the range of 1550 to 1560 nm. This is the correct answer because this wavelength range is particularly suited for long-distance transmission of video signals due to its lower attenuation and higher capacity for bandwidth. The fibers at this wavelength can effectively carry multiple channels of high-definition video content, making them ideal for modern broadband services.

In addition to that, the use of this specific wavelength helps in minimizing the impact of dispersion, which can degrade signal quality over longer distances. The choice of 1550 to 1560 nm also aligns with the standard practices in the fiber optic industry, where this range has been widely adopted for its efficiency in handling video distribution in PON systems.

The other ranges listed are not typically used for video distribution in PON technology, as they may be designated for other types of signal transmission, such as voice and data, or may result in significant losses over distance.