Fiber Optic Cable Connector Specification Table

Fiber optic connectors are precision devices that align and secure optical fibers, with specifications varying by type, ferrule size, fiber mode, and performance metrics such as insertion loss and return loss.

Key Connector Types and Specifications

Connector Type

Ferrule DiameterFiber ModeTypical Insertion LossTypical Return LossKey FeaturesCommon ApplicationsSC (Standard Connector)2. 5 mmSingle-mode / Multimode0. 2–0.

5 dB≥ 50 dB (SM)Snap-on, push-pull, square bodyGigabit Ethernet, telecom, patch panelsLC (Lucent Connector)1. 25 mmSingle-mode / Multimode0. 1–0.

3 dB≥ 50 dB (SM)Small form-factor, high-density, latch mechanismData centers, high-density cablingST (Straight Tip)2. 5 mmSingle-mode / Multimode0. 2–0.

5 dB≥ 40 dB (SM)Bayonet twist-lock, cylindrical ferruleLegacy networks, industrialFC (Ferrule Connector)2. 5 mmSingle-mode0. 2–0.

5 dB≥ 55 dB (SM)Screw-on, high precisionTest equipment, high-vibration environmentsMPO / MTP (Multi-Fiber Push-On)1. 25 mm per fiberSingle-mode / Multimode0. 35 dB per fiber≥ 50 dB (SM)Multi-fiber, push-pull, guide pinsHigh-density data centers, ribbon cablesE20002.

0 mmSingle-mode0. 1–0. 3 dB≥ 55 dB (SM)Spring-loaded shutter, high return lossTelecom, high-performance networksFischer FO Connectors (SE, KE, DBE)1–2.

5 mmSingle-mode / Multimode0. 2–0. 5 dB≥ 50 dB (SM)Push-pull, multiway, optional electrical contactsIndustrial, military, broadcast systemsConnector Structure and FeaturesFerrule: Aligns the fiber core; precision polishing minimizes signal loss and reflection.

Connector Body: Protects the ferrule and provides mechanical stability. Attachment Mechanism: Push-pull, screw-on, or bayonet for secure mating. Boots / Strain Relief: Protects the fiber from bending and mechanical stress.

Performance Considerations

Insertion Loss: Typically 0. 1–0. 5 dB depending on connector type and fiber mode.

Return Loss: Higher for single-mode connectors (≥ 50 dB) to reduce back reflection. Fiber Mode Compatibility: Single-mode (9/125 µm) or multimode (50/125 µm, 62. 5/125 µm).

Multi-

Fiber Options: MPO/MTP connectors can connect up to 24 fibers simultaneously, ideal for high-bandwidth applications.

Applications

Telecommunications: SC, LC, FC, E2000 connectors for long-distance and high-performance networks. Data Centers: LC and MPO/MTP for high-density, high-speed connections. Industrial / Military: Fischer FO connectors with multiway and optional electrical contacts for rugged environments.

Patch Panels and Test Equipment: ST and FC connectors for legacy systems and precision testing. This table and overview provide a comprehensive reference for selecting fiber optic connectors based on mechanical design, optical performance, and application requirements.