Views: 599 Author: Anna Publish Time: 2026-04-27 Origin: Site
The 10G SFP+ dual-fiber optical module is a small, pluggable optical transceiver with a dual-fiber bidirectional design. It uses two independent optical fibers to complete signal transmission (Tx) and reception (Rx) respectively, ensuring the stability and reliability of signal transmission.
It complies with standards such as IEEE 802.3ae, SFF-8472, and SFF-8431, and can provide transmission rates up to 10Gbps, meeting the needs of high-speed data transmission. Compared to single-fiber modules, the dual-fiber structure has higher signal isolation and stability, and is widely used in data centers, enterprise networks, and telecommunications transmission scenarios.
It is a high-performance, cost-effective module that supports transmission rates up to 10.3125Gbps and a transmission distance of up to 300 meters over multimode fiber. This transceiver consists of two parts: the transmitting section contains a laser driver and an 850nm VCSEL laser; the receiving section contains a PIN photodiode, a transimpedance preamplifier (TIA), and a limiting amplifier. The module is hot-swappable and connects via a 20-pin connector. The high-speed electrical interface is based on low-voltage logic with a nominal differential impedance of 100 ohms, and internal AC coupling is used.
The optical output can be disabled via the LVTTL logic high-level input of TX_DIS. The transmit fault (Tx_Fault) output indicates that the module's transmitter has detected a fault related to laser operation or safety. The signal loss (RX_LOS) output indicates the loss of the input optical signal to the receiver. The serial EEPROM in the transceiver allows users to access the transceiver's monitoring and configuration data via a two-wire SFP management interface. This interface uses a single address A0h, with its memory mapping divided into low and high zones. Basic digital diagnostic (DD) data is stored in the low zone, while specific data is stored in the high zone memory in tabular form.
This is a high-performance, cost-effective module supporting transmission rates up to 10.3125Gbps and a transmission distance of up to 10km over single-mode fiber. The transceiver consists of two parts: the transmitter includes a laser driver and a 1310nm DFB laser; the receiver includes a PIN photodiode and integrates a transimpedance preamplifier (TIA) and a limiting amplifier. The module is hot-swappable and connects via a 20-pin connector. The high-speed electrical interface is based on low-voltage logic with a nominal differential impedance of 100 ohms, and internal AC coupling is used.
The optical output can be disabled via the LVTTL logic high-level input of TX_DIS. The transmit fault (Tx_Fault) output indicates that the module transmitter has detected a fault related to laser operation or safety. The signal loss (RX_LOS) output indicates the loss of the input optical signal to the receiver. The serial EEPROM in the transceiver allows users to access the transceiver's monitoring and configuration data via a two-wire SFP management interface. This interface uses a single address, A0h, with its memory mapping divided into low and high sections. Basic digital diagnostic (DD) data is stored in the low section, while specific data is stored in the high section memory in the form of tables.
Type | |||
Maximum transmission rate | 10.3125Gbps | 10.3125Gbps | |
Wavelength | 850nm | 1310nm | |
Maximum transmission distance | 300m@OM3/400m@OM4 | 10km | |
Cable type | MMF | SMF | |
Transmitter type | VCSEL | DFB | |
Transmit power | -6~1dBm | -7~1dBm | |
Receiver sensitivity | < -11dBm | <-14dBm | |
Maximum power consumption | ≤1W | ≤1W | |
Operating temperature | 0~70°C（32~158°F） | 0~70°C（32~158°F） | |
Q: What are SFP-10G-SR and SFP-10G-LR?
A: SFP-10G-SR and SFP-10G-LR are 10G small pluggable modules for fiber optic networks. Modules marked "SR" indicate short-distance, while those marked "LR" indicate long-distance. These modules are suitable for specific distances and fiber types on 10 Gigabit Ethernet networks.
Q: Generally speaking, what are the differences between SFP-10G-SR and SFP-10G-LR?
A: The main difference between SFP-10G-SR and SFP-10G-LR lies in the transmission distance and the type of fiber used. SFP-10G-SR uses multimode fiber for short-distance applications; for OM3 fiber, the maximum distance is approximately 300m. SFP-10G-LR uses single-mode fiber, and the maximum distance can reach 10 kilometers.
Q: Which SFP module is suitable for my 10G network?
A: To choose a good SFP module, you need to consider several parameters, such as the possible transmission distance, the type of fiber optic cable used in the network (multimode or single-mode), whether the SFP module is compatible with specific network equipment (Cisco, etc.), and the data type that needs to be transmitted. SFP-10G-SR is suitable for short-distance connections within a data center, while SFP-10G-LR is suitable for connections across buildings or campuses and for longer distances.
Q: Are SFP-10G-SR and SFP-10G-LR modules interchangeable?
A: SFP-10G-SR and SFP-10G-LR cables are not interchangeable because they differ in optical capacity and fiber type range. Inconsistent modules throughout the network may damage the supplied equipment. When operating the equipment, ensure that the correct type of module is used.
Q: Are there other types of SFP 10G modules besides SR and LR modules?
A: Yes, there are other modules, such as LRM, ER, or ZR, and 10G SFP modules are not limited to SR or LR. All of these modules are designed for very specific distances and network setups. The choice between an SFP 10G SR or LR module depends on the intended use and the distance required for networking in an optical transport network.
