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Author: James Publish Time: 11-08-2025 Origin: Site
Data centers, enterprise networks, and telecom operators are increasingly seeking extremely high bandwidth. In this context, 10G BiDi SFP+ (Bidirectional) transceivers are becoming very popular solutions for short-distance optical communication. Its primary purpose is single-fiber bidirectional transmission, enabling the conservation of fiber capacity and facilitating flexible deployment.
Design: Square-shaped type with a pull/push mechanism and a big 2.5 mm ceramic ferrule for high performance.
Size: Its larger body is not recommended for highly crowded scenarios such as data centers.
Compatibility: Commonly found on single-mode fiber systems, especially in low-density or legacy designs.
Design: Miniature latch-type connector with a small 1.25 mm ferrule, which is half the size of an SC connector.
Size: A small form factor enables high-density deployments, requiring fewer switch panels in data centers.
Cost & Manufacturing: A bit higher fabrication difficulty; however, larger port density will lower wiring cost.
Feature | SC Interface | LC Interface |
Ferrule Diameter | 2.5 mm | 1.25 mm |
Connector Size | Larger, square push-pull design | Smaller, latch-type design |
Port Density | Lower, not ideal for high-density panels | Higher, ideal for data center front panels |
Compatibility | Common in single-mode, legacy, and industrial networks | Common in modern high-density networks |
Deployment Suitability | Low-density, long-distance, industrial, and legacy upgrades | High-density, high-speed, scalable deployments |
Cabling Complexity | Simple and intuitive | Compact but requires more precise handling |
Typical BiDi Application | Long-haul single-mode links with fewer ports | Short-to-medium haul in dense switch environments |
In BiDi transceivers, wavelength division multiplexing (WDM) is utilized to send and receive signals using two wavelengths (for instance, the space between 1310 nm and 1550 nm) on a single fiber, which consequently contributes to a 50% reduction in fiber usage.
10G BiDi SFP+ Module: Near always LC simplex interface; supports lengths up to 80 km (for instance, 1490 nm/1550 nm), suited for backbone and metropolitan networks.
40G BiDi QSFP+ Module: LC duplex interface; two 20 Gbps channels, reaching 100 m (OM3) to 150 m (OM4), intended for 10G-to-40G upgrades.
LC: Excellent SC fiber is utilized in BiDi single-fiber modules at data center core switches, where density advocates scalability.
SC: SC remains fully supported by BiDi, but its larger size provides an edge for industrial and low-density networks, as well as single-mode applications that are extensively used over long distances.
Easy Introduction: Due to the SC's push-pull mechanism, its application in situations where small offices are clustered together will not be complex and will not require specialized skills or expertise.
Scalability: Incremental modular design that supports gradual upgrades without stagnant speculation adjustments to infrastructure.
Cost-Effective on Long-Distance Fiber Links: For Industrial Control Networks, spending on SC BiDi modules for long-distance, low-density fiber lines poses the best options, as they significantly reduce fiber deployment costs.
Improving Old Equipment Upgrades: SC's upgrade to 10 Gbps with BiDi technology provides the capability of speed without the need for the original installation of optical fiber.
New and upgrading high-speed network projects or works → Opt for the 10G BiDi SFP+ modules with LC interface to obtain higher density and scalability.
Projects include SC equipment → Avail SC-socket interface modules to connect with SC equipment and facilitate a gradual transition to LC equipment.
SC or industry-specific environments → Choose the interface type based on operational issues, performance, and maintenance concerns.
Both SC and LC interfaces in 10G BiDi SFP+ transceivers present their advantages. LC typically plays a crucial role in high-density, high-speed networks, whereas SC is often noisy and is used for industrial and legacy purposes. The complexity of a case will depend on your network density, its plans for growth, and the current state of aging infrastructure.
James is a technical manager and associate at Zion Communication.
Specializes in Optical Fiber communications, FTTH Solutions,
Fiber optic cables, ADSS cable, and ODN networks.
james@zion-communication.com
+86 13777460328
