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Views: 139 Author: Anna Publish Time: 2026-08-20 Origin: Site
With the continuous development of the optical communication industry, 1G and 10G optical modules have been widely used in the market. Today we will compare the two series of products, SFP LC 1.25G BIDI and SFP+ LC 10G Dual.
Contrast Dimensions | SFP LC 1.25G single fiber | SFP+ LC 10G dual fiber |
Transmission rate | 1.25 Gbps | 10.3125 Gbps |
Interface type | Simplex LC interface | Duplex LC interface |
Number of optical fibers | 1 (single fiber bidirectional transmission) | 2 (one sending and one receiving for independent transmission) |
Technical principles | WDM (such as 1270nm/1330nm) | Dual fiber independent transmission (such as 850nm or 1310nm) |
Encapsulation and interoperability | SFP package, compliant with IEEE 802.3z standard | SFP+ package, compliant with IEEE 802.3ae standard, physical size compatible with SFP, but the rate needs to correspond to the SFP+ port |
Pairing requirements | Must be used in pairs, and the wavelengths at both ends need to be cross-matched (such as TX1270/RX1330 at A side, and vice versa at B side) | No pairing required, just use the same model on both ends, plug and play |
The SFP+ LC 1G single-fiber optical module is suitable for situations where fiber resources are very tight. Imagine that an old building is renovated or the optical fiber has been laid, leaving only a single-core optical cable that cannot be re-routed. 1G single-fiber becomes the only solution. It can complete reception and transmission with one optical fiber, saving a lot of expenses. Therefore, it is more common in FTTx, video surveillance backhaul and other scenarios.
The speed of SFP+ LC 10G dual fiber is 10 times that of the 1G module. It is very suitable for the interconnection of servers and switches in the data center and the data aggregation and forwarding of enterprise core networks. With sufficient fiber resource planning, it is not a problem to have two optical fibers, one receiving and one transmitting. In medium and long distances, it is suitable for 10 kilometers of metropolitan area network interconnection and 40-120 kilometers of backbone network extension.
In short, if the optical fiber is not enough, the 1G single-fiber module can solve the problem of network failure. If the broadband is not enough, then the 10G dual-fiber module can solve the problem of slow network.
The core advantage of SFP LC 1G single fiber is to save fiber resources. Through wavelength division multiplexing technology, it only requires one fiber to achieve two-way communication, directly saving half of the fiber usage. SFP+ LC 10G dual fiber requires at least 2 available fibers at both ends of the link, one for sending and one for receiving.
In new networks, broadband planning is given priority, and 10G dual-fiber modules can directly provide 10G speeds, which has become a common choice for data centers and enterprise interconnections as bandwidth demands increase. SFP LC 1G single-fiber module is defined as a special solution in newly built networks. It is selected and used when facing extremely long transmission distances, high fiber laying costs, or bandwidth requirements are specific to 1G and will not be upgraded in the future.
In short-distance scenarios, the unit price of 10G dual-fiber multi-mode modules is lower than that of 1G single-fiber modules at the same distance, but in long-distance scenarios, the unit price difference between the two is not significant. Moreover, the 1G single-fiber module has an integrated WDM coupler inside, and the process is more complicated. Its unit price is usually higher than that of a dual-fiber module with the same speed and distance. The more critical dimension is optical fiber. 1G single fiber only uses one optical fiber, while 10G dual fiber requires two optical fibers. When evaluating a module, you cannot just look at the module price. Optical fiber resources need to be taken into consideration in the cost dispute.
YXFiber is a Chinese manufacturer specializing in the R&D, production and sales of optical communication optical modules. Its main products cover SFP, SFP+, SFP28, QSFP, QSFP28 series and high-speed data center optical modules. Our products have reliable quality and reasonable prices. We support 0EM, ODM customization and after-sales guarantee services. Welcome to consult and purchase online.
