Optical module classification By package: 1*9, GBIC, SFF, SFP, XFP, SFP+, X2, XENPARK, 300pin, etc. By rate: 155M, 622M, 1. 25G, 10G, 40G, etc. By mode: single-mode fiber (yellow) . QSFP-DD (Quad Small Form-factor Pluggable-Double Density) Optical Module: Double-density four-channel small pluggable packaged optical module, defined by the QSFP-DD MSA group as a high-speed pluggable module. Enhanced SFP (eSFP) optical module: supports monitoring of voltage, temperature, bias current, transmit power, and receive power. They are widely used in data centers, telecommunications networks, and industrial communication systems. Understanding their classifications and types is essential. An optical module is a typically hot-pluggable optical transceiver used in high-bandwidth data communications applications. Optical modules typically have an electrical interface on the side that connects to the inside of the system and an optical interface on the side that connects to the outside. Optical Interface Type: Common optical module interface types include dual LC interface, single LC interface, SC interface, and MPO interface. Dual LC interfaces are suitable for dual-fiber optical modules, while single LC interfaces and SC interfaces are commonly used for single-fiber. In the era of 5G, AI, and high-speed data centers, optical modules serve as the core bridge for converting electrical signals to optical signals (and vice versa), enabling fast, reliable data transmission across networks.