Fiber Patch Cord Single mode – Ultra-Speed 100% Low-Loss, High-Reliability
Single mode fiber optic patch cords are essential components in high-speed, long-distance optical communication systems. Engineered for precision and minimal signal loss, these patch cords serve as the backbone for modern telecom, data center, and enterprise networks. There are various types of single mode patch cords designed to accommodate specific installation requirements and connector preferences. Below is a detailed breakdown of the main types based on connector type, polish finish, structure, and specialty applications.
1. Connector Types
Single mode patch cords come in a wide range of connector configurations. The most commonly used include SC, LC, FC, and ST. These connectors are available in identical or hybrid combinations:
- SC to SC: Square-shaped push-pull connectors; commonly used in telecom and FTTH setups.
- LC to LC: Small Form Factor (SFF) connectors with a latch mechanism, ideal for high-density panels.
- FC to FC: Threaded connectors for a more secure connection; often used in test environments.
- ST to ST: Bayonet-style connector used in legacy systems.
- Hybrid Patch Cords: Examples include SC to LC, LC to FC, and LC to ST, which are used to bridge different device interfaces.
2. Polish Types
The polish type affects the return loss and reflection performance of the patch cord:
- UPC (Ultra Physical Contact): These have a flat polish with low reflectance (typically ≥ 55 dB). Identified by blue connector housings, UPC is suitable for most general-purpose networks.
- APC (Angled Physical Contact): These connectors feature an 8° angled polish for superior return loss (≥ 60 dB). They are ideal for applications requiring high precision, such as RF video and high-speed data. APC connectors are easily identified by their green color.
3. Cable Structure
- Simplex: Contains a single fiber for one-way communication. Often used where bi-directional data transfer isn’t required.
- Duplex: Contains two fibers, typically used in transmission and reception simultaneously. Common in LAN and switch-to-switch connections.
- Armored: Reinforced with steel or Kevlar for protection in harsh environments like outdoor or industrial installations.
- Bend-Insensitive: Designed with special fiber types to tolerate tight bends, minimizing signal loss and breakage.
4. Jacket Size and Materials
Patch cords are available in different jacket diameters—0.9mm, 2.0mm, and 3.0mm—each suited for specific use cases. A 3.0mm jacket offers more rugged protection, while 0.9mm is used for internal patching or pigtails. Jackets are typically yellow in color, conforming to industry standards for single mode fiber.
5. Special Types
- Mode Conditioning Patch Cords: Used when connecting multimode equipment to single mode fiber to prevent differential mode delay.
- Custom Length Cords: Pre-terminated at factory to meet exact specifications (e.g., 1m, 3m, 5m, 10m).
- High-Density Patch Cords: Built with ultra-thin designs for better cable management in crowded racks.
Conclusion
Single mode patch cords are diverse and customizable to support a broad range of network environments. Whether you require SC/APC to LC/UPC simplex cords for GPON or armored duplex cords for outdoor use, understanding these types ensures optimal performance, durability, and compatibility with your optical infrastructure.
Complete Types of Single Mode Fiber Optic Patch Cords
| Category | Type | Details |
|---|
| Connector Types | SC to SC | Square push-pull connectors; widely used in telecom. |
| LC to LC | Compact latch connectors; ideal for dense racks. |
| FC to FC | Threaded connectors; ensure tight connections. |
| ST to ST | Bayonet-style; used in legacy systems. |
| SC to LC / LC to FC / LC to ST | Hybrid patch cords for device compatibility. |
| Polish Types | UPC (Flat Polish) | Ultra Physical Contact, flat polish with low return loss (~ -55 dB), blue connectors. |
| APC (Angled Polish) | Angled Physical Contact (8°), ultra-low reflectance (~ -60 dB), green connectors. |
| Cable Structure | Simplex | Single fiber strand for one-way transmission. |
| Duplex | Two fibers for bidirectional communication. |
| Armored | Metal-jacketed for mechanical and rodent protection. |
| Bend-Insensitive | Minimized signal loss in tight routing environments. |
| Jacket Size | 0.9mm | Used for pigtails and internal patching. |
| 2.0mm | Standard patch cord diameter for general use. |
| 3.0mm | Durable outer jacket for rugged applications. |
| Specialty Types | Mode Conditioning Patch Cord | Used to connect single-mode devices to multimode fiber. |
| Pre-Terminated Patch Cord | Factory polished and tested; ready for plug-and-play use. |
| Custom Length Patch Cord | Available in custom lengths: 1m, 3m, 5m, 10m, 20m, etc. |
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