Do fiber optic pigtails not have a coating

Fiber optic pigtails do have a protective coating, typically a tight-buffered layer, even though one end is exposed for splicing.

Fiber optic pigtails are short lengths of optical fiber with a factory-terminated connector on one end and an exposed fiber on the other end designed for fusion or mechanical splicing in the field . While the exposed end is often referred to as "bare fiber," it is usually covered with a tight-buffered coating, commonly 900µm around the 250µm glass core, which provides mechanical protection during handling, bending, and splicing . This coating reduces the risk of micro-cracks or breakage and simplifies field installation. Unlike patch cords, which have connectors on both ends and thicker jackets (2.0–3.0 mm) for durability in open routing environments, pigtails are designed for protected enclosures such as splice trays, optical distribution frames, or terminal boxes. Indoor pigtails often have minimal protective layers, while armored or waterproof variants include additional metal or polymer sheathing for harsh environments . In summary, fiber optic pigtails are not completely uncoated; they have a protective tight-buffered layer around the fiber, even though the end is prepared for splicing. The coating ensures durability and ease of handling while maintaining the fiber's optical performance.