Which technology allows for more efficient utilization of bandwidth by using different wavelengths of light?

Wavelength Division Multiplexing (WDM) is the correct technology that enables more efficient utilization of bandwidth by using different wavelengths of light. WDM works by combining multiple optical signals onto a single optical fiber by using different wavelengths (or colors) of laser light. This technique allows multiple data streams to be transmitted simultaneously over a single fiber optic cable, significantly increasing the capacity of the fiber without needing additional physical infrastructure.

The advantage of WDM lies primarily in its ability to maximize the use of available bandwidth in fiber optic systems. Each wavelength can carry a separate channel of data, which means that fiber networks can transport vastly more data than would be possible with a single wavelength. This is critical in today’s high-demand environments where data transmission needs are continually increasing.

In contrast, the other technologies mentioned serve different purposes in data transmission. Time Division Multiplexing (TDM) allocates different time slots for each signal over a single channel, which is less efficient in high-capacity environments than WDM. Asynchronous Transfer Mode (ATM) is a network technology designed to carry multiple types of traffic using fixed-size cells but does not utilize wavelengths of light. Frequency Division Multiplexing (FDM) divides bandwidth into separate frequency bands but is generally associated with