What are the specific application scenarios of optical splitter and WDM?

Specific applications are various optical terminals, optical communication terminals, etc.

Wavelength division multiplexer (WDM) combines optical signals with different wavelengths into one optical fiber for transmission, while wavelength division multiplexer, on the other hand, separates the combined optical signals with different wavelengths.

An optical splitter is equivalent to splitting an optical fiber into multiple optical fibers. It was spread to different places, just like a toy that was popular a few years ago. It has a handle for holding batteries at the bottom and a small light bulb at the top. Then the front end of the small light bulb is a scattered wick with various colors of light on it, which looks good. This thing is a simple optical splitter on the light bulb under the wick.

Extended data:

The optical signals separated by the demultiplexer are the same, including all the optical signals transmitted on this optical path. But for the terminal equipment, the signal it wants to pick up is an optical signal with a specific wavelength (such as 13 10, 1550), so it is impossible to connect all the optical signals, so a wavelength division multiplexing device should be added at the optical path entrance of the terminal equipment.

At present, optical communication equipment has been widely used, and long-distance communication has begun to be used. Optical transceivers, switches with optical ports, ZTE and Huawei also have special services to provide integrated optical communication, which are more widely used in these fields.