Fiber Optic Specification and Model Comparison

Fibers are primarily categorized into single-mode (G.65x series) and multimode (OMx series), with different models corresponding to specific core diameters, wavelengths, and transmission distances. Fiber optic cable models indicate the jacket and construction.

Single-mode fiber specifications
G.652 Standard Single Mode: The most commonly used, with a core diameter of 9/125μm, suitable for wavelengths of 1310nm and 1550nm, widely employed in metropolitan area networks and long-haul communications.
G.657 Bend-Insensitive Singlemode: Small bending radius (minimum 5mm), specifically designed for Fiber to the Home (FTTH) and indoor cabling, compatible with G.652.
G.654/G.655: Designed for submarine long-distance transmission and dense wavelength division multiplexing (DWDM) systems, respectively, with lower attenuation. ‌‌‌

Multimode Fiber Specifications
OM1/OM2: Core diameter 62.5/125μm or 50/125μm, supports Gigabit Ethernet, shorter transmission distance (OM2 approximately 82 meters), orange jacket.
OM3/OM4: Laser-optimized 50/125μm fiber optic cable, supporting speeds of 10Gbps and above. OM3 has a transmission distance of 300 meters, while OM4 can reach up to 550 meters, with a water blue jacket.
OM5: The next-generation broadband multimode fiber, supporting short-wavelength division multiplexing, suitable for 400G Ethernet, with lime green jacket. ‌‌‌

Optical cable model structure
Classification Code: GY represents outdoor optical cable for communication, and GJ denotes indoor optical cable, with the first segment defining the usage scenario.
Structure and Sheath: Subsequent letters represent reinforcement (F for non-metallic), structure (T for filled), and sheath (Y for polyethylene). For example, GYTA denotes an outdoor filled aluminum-polyethylene bonded layer optical cable.
Core Count Identification: The number following the model indicates the number of optical fibers. For example, 12B1.3 represents 12 G.652C single-mode fibers, which should be selected based on the cabling distance. ‌‌‌‌