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), multi-mode. 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. An interesting new development is the area of Photonics Integrated Circuits (PICs). PICs are devices that integrates multiple (at least two) photonic functions and as such is similar to an electronic integrated circuit, typically also produced in standard semiconductor compliant processes. This. 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. They are used in fiber optic communication systems to transmit data over long distances with minimal loss and interference. 5 billion+ shipment records with 20+ precision filters to uncover the most reliable and economical suppliers for you. There are many types of optical modules, and there are several standard ways to categorize them, such as according to different package forms, different.