Abstract: The construction of operator 4G / 5G Network, the rapid growth of enterprise customers and the requirement of rapid opening of business, the consumption of optical fiber resources has increased significantly, the existing bearing network has caused great pressure, how to achieve low cost, fast access, improve the effectiveness of investment has become the main problem faced by operators at present. The passive wavelength division technology is in line with the problems of solving the shortage of existing optical fiber resources, the difficulty of laying the fiber optic cable again,the construction investment, the repeated construction of optical cable, the long construction period, and so on, the use of passive wavelength division multiplexing technology can greatly reduce the construction investment, and finally achieve the maximization of optical fiber resource utilization.

Key words: passive wavelength division, network construction, fiber optic utilization, enterprise network, 5G