While offering numerous advantages, there are limitations to consider:

• Limited Functionality: Passive devices cannot amplify signals. This limits their use in scenarios requiring long-distance transmission with significant signal degradation. In such cases, active devices like optical amplifiers become necessary.

• Signal Power Management:Careful planning is required when using passive devices to ensure adequate signal power levels throughout the network. Signal loss accumulates with each connection, so the number and type of passive devices used need to be optimized for the desired transmission distance and signal strength.

In conclusion, optical passive devices are essential components for manipulating light signals within fiber optic networks. Their simplicity, reliability, and cost-effectiveness make them a valuable asset in various communication and sensing applications. However, understanding their limitations is crucial for designing efficient and reliable fiber optic systems.