Multimode fiber optic patch cord connector types

Multimode fiber optic patch cords commonly use LC, SC, ST, MPO/MTP, FC, MU, MT-RJ, and E2000 connectors, each suited for specific network applications and densities.

Common Connector Types

• LC (Lucent Connector): Small form factor, duplex, widely used in modern data centers, fits high-density transceivers like QSFP modules, ideal for OM3/OM4/OM5 multimode fibers .
• SC (Subscriber Connector): Square, snap-in, simplex or duplex, common in LANs and PON networks, compatible with OM1/OM2/OM3/OM4 fibers .
• ST (Straight Tip): Bayonet mount, older design, still used in legacy LANs, supports multimode fibers with 50 µm or 62.5 µm cores .
• FC (Ferrule Connector): Screw-on thread, robust for high-vibration environments, less common in modern data centers .
• MPO/MTP (Multi-Fiber Push-On): Multi-fiber connector housing 8, 12, or 24 fibers, essential for high-density parallel optics like 40G/100G multimode links .
• MU (Miniature Unit): Small form factor, duplex, used in high-density applications, compatible with multimode fibers .
• MT-RJ (Mechanical Transfer – Registered Jack): Duplex, compact, used in older multimode networks, supports 50 µm or 62.5 µm cores .
• E2000: High-performance connector with spring-loaded shutter, used in telecom and industrial multimode applications .

Multimode Fiber Standards

• OM1 (62.5 µm, Orange): Short-distance LANs, legacy systems.
• OM2 (50 µm, Orange): Moderate distance, LANs.
• OM3 (50 µm, Aqua): High-speed 10G–40G intra-data center links.
• OM4 (50 µm, Violet): Extended reach for 40G–100G multimode networks.
• OM5 (50 µm, Lime Green/Violet): Supports wideband multimode for future high-speed applications .

Additional Considerations

• Simplex vs Duplex: Simplex transmits in one direction; duplex supports bidirectional communication, commonly used in LC and SC connectors .
• Indoor vs Outdoor: Indoor patch cords are for controlled environments; outdoor cords may include armored, waterproof, or self-supporting designs for environmental protection .
• Ferrule Polish Types: PC, UPC, and APC affect return loss and back-reflection, important for multimode performance in high-speed networks . Selecting the right connector type depends on network density, transceiver compatibility, fiber standard, and environmental conditions. LC and MPO/MTP dominate modern data centers for multimode applications, while SC, ST, and FC are more common in legacy or industrial setups.