With the advent of the information age, the demand for data center upgrades and expansions has become essential. Expanding fiber optic network capacity by laying more fiber is time-consuming and labor-intensive, significantly increasing both network investment and operational costs. However, CWDM & DWDM multiplexers/demultiplexers can completely avoid these drawbacks. Utilizing the multiplexing and demultiplexing technology of CWDM & DWDM multiplexers/demultiplexers offers an ideal solution for expanding fiber capacity based on existing fiber optic infrastructure. North Ocean Photonics can provide various packaging solutions for this technology.