The rapid development of science and technology makes people's lives change with each passing day. The rapid development of application markets such as 5G, big data, blockchain, cloud computing, Internet of Things, and artificial intelligence has brought explosive growth to data traffic, and data center interconnection has gradually developed into a research hotspot in optical communications. The current application scenarios of high-speed optical modules are mainly divided into Internet data center networks, metropolitan area network optical transmission networks, and telecommunications networks represented by 5G bearer networks. So how do we choose when purchasing optical modules? Today, the editor of optical module manufacturers will talk about the difference between single-mode optical modules and multi-mode optical modules?bag in box custom

　　1. Different wavelengths

　　The working wavelengths of single-mode optical modules are usually 1310nm and 1550nm;

　　The working wavelength of the multimode optical module is 850nm;

　　2. Different transmission distances

　　The longest transmission distance of multi-mode optical modules does not exceed 2KM, while the transmission distance of single-mode optical modules is generally more than 10KM;

　　3. Different light sources

　　The multi-mode optical module uses LED or VCSEL laser as the light source, and the single-mode optical module uses FD-LD laser or DFB-LD laser as the light source;

　　4. Different with optical fiber

　　The multi-mode optical module is used with multi-mode fiber, and the single-mode optical module is used with single-mode fiber;

　　5. Different application scenarios

　　Multi-mode optical modules can only be used for short-distance transmission. For example, the longest transmission distance of gigabit multi-mode optical modules is 550M, which is suitable for the internal interconnection of data centers, and single-mode optical modules are suitable for medium and long-distance metropolitan area network transmission.