What model is the multimode optical module

Multimode optical modules are designed to work with OM1, OM2, OM3, OM4, and OM5 fibers, supporting short-range high-speed communication using SFP, SFP+, and QSFP form factors.

Multimode Fiber Types and Specifications

Multimode fibers (MMF) are classified into five main types, each optimized for different bandwidths, core sizes, and transmission distances: OM1: Legacy 62. 5 µm core fiber, LED-based, supports 1G Ethernet up to 275 meters and 10G Ethernet up to 33 meters. Mostly used in older buildings and legacy networks.

OM2: 50 µm core fiber, LED-based, supports 1G Ethernet up to 550 meters and 10G Ethernet up to 82 meters. Suitable for early 50 µm systems but limited for high-speed networks. OM3: 50 µm laser-optimized fiber, designed for VCSEL sources, supports 10G Ethernet up to 300 meters, 40G/100G up to 100 meters.

Common in modern enterprise and data center networks. OM4: Enhanced laser-optimized 50 µm fiber, supports 10G Ethernet up to 550 meters, 40G/100G up to 150 meters. Mainstream for new high-speed deployments.

OM5: Wideband multimode fiber supporting Shortwave Wavelength Division Multiplexing (SWDM), enabling multiple wavelengths over a single fiber for higher aggregate bandwidth.

Multimode Optical Modules

Optical modules for multimode fiber are typically hot-swappable transceivers that convert electrical signals to optical signals. Common types include: SFP (Small Form-factor Pluggable): Supports 1G to 10G speeds, typically using 850 nm VCSEL lasers for multimode fiber. Example: SFP1G-SX-85, with transmission distances from 100 m to 550 m depending on fiber type.

SFP+: Enhanced SFP supporting 10G to 25G speeds, compatible with OM3/OM4 fibers for longer distances. QSFP/QSFP28: Quad Small Form-factor Pluggable modules for 40G and 100G Ethernet, often used in data centers with OM3/OM4 fibers. Transceivers: Multimode transceivers include both transmitters and receivers packaged together, available in LC connector interfaces for short-range applications.

Key Considerations

Fiber Compatibility: Ensure the optical module matches the fiber type (OM1–OM5) and core size (50 µm or 62. 5 µm). Distance and Speed: Module selection depends on required data rate and link distance.

OM3/OM4 fibers are preferred for high-speed 10G–100G links. Connector Type: LC connectors are standard for multimode SFP and QSFP modules. Cost and Power: Multimode modules are generally less expensive and consume less power than single-mode modules, making them ideal for short-range, high-density deployments.

By selecting the appropriate OM fiber type and compatible optical module, network engineers can optimize short-range high-speed communication in enterprise networks, data centers, and campus environments.