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Can I connect single mode SFP to multimode SFP?
Knowledge Base + 2024.01.05

No, you cannot directly connect a single mode SFP to a multimode SFP. This is because they use different types of fiber optic cables and have different transmission characteristics. However, you can use a media converter to convert the signals between single mode and multimode SFPs, allowing you to connect them together.

How do BIDI modules work?

The working principle of BIDI optical module is to filter (filter unwanted center wavelength) through the filter in the optical module, while completing the transmission of one wavelength optical signal and the reception of another wavelength optical signal, in order to achieve bidirectional communication there must be the other end of the completion of the reception of one wavelength optical signal and the transmission of another wavelength optical signal. For example, this end of the transmitted optical signal is 1310nm received optical signal is 1550nm, then the other end of the must be the opposite, that is, the transmitted optical signal is 1550nm received optical signal is 1310nm. This is also the reason why the BIDI module is used in pairs.

What is a single-fiber bi-directional optical module?

BiDi optical modules are compact and are mainly used in the field of optical communication, including telecommunication and bi-directional data communication. Single-fiber bi-directional BiDi refers to an optical fiber can be transmitted in both directions at the same time to send and receive optical signals, like the road by the isolation zone separated by the front and back of the two directions of the lane, the two sides of the vehicle in their respective lanes, without interfering with each other. Conventional fiber optic transmission is single-fiber unidirectional, so to achieve two-way communication requires two optical fibers.

What is the working principle of BIDI single-fiber bidirectional optical module?

BIDI single-fiber bi-directional optical module to achieve the send and receive optical signals in both directions at the same time, need to send and receive direction using different wavelengths of light. Generally, optical modules have two ports, one transmitting port and one receiving port. While single-fiber bidirectional optical module has only one port, through the filter in the optical module for filtering, simultaneously complete a wavelength optical signal transmission and another wavelength optical signal reception, or vice versa.

For example, the local end transmits 1310 nm optical signals and receives 1550 nm optical signals at the same time. The opposite end uses the opposite wavelength to the local end, i.e., transmits a 1550 nm optical signal and receives a 1310 nm optical signal. Therefore, the module must be used in pairs at both ends of the link. Single-fiber bidirectional optical module commonly used wavelengths are 1310 nm/1490 nm, 1510 nm/1590 nm.

The unidirectional bi-directional transceiver module is an integrated assembly of MQW-TO-LD light source, TO-PIN-TIA (Transimpedance Amplifier) detector, beam splitter, optical fiber, and other components using coaxial coupling process.

Why BiDi Optical Module?

The most obvious advantage of BiDi optical modules, such as SFP+ BiDi optical modules or SFPBiDi optical modules, is that it can reduce the number of ports on the fiber optic patch panels, saving the cost of fiber optic cabling infrastructure, and it can also reduce the cabling space, which is helpful for fiber optic management, and reduces the number of fibers to be used.

BiDi optical modules (WDM optical modules) are more expensive than traditional dual-fiber bi-directional optical modules, but the number of fibers required for BiDi optical modules per unit of distance traveled is cut in half. For many network circuits, the cost savings of using fewer fibers far outweighs the expense of purchasing BiDi modules.

Where are BiDi single-fiber bi-directional modules used?

Single-fiber bi-directional is typically used in subscriber access networks to cost-effectively communicate images with data and voice.

What is Singlemode Dual Fiber Transceiver?

Singlemode Dual Fiber Optic Transceiver, Single Fiber Bi-directional Fiber Optic Transceiver type is optoelectronic conversion equipment, the advantage is to save half of the optical fiber.

Single fiber bi-directional fiber optic transceiver is the use of wavelength division multiplexing technology, in a single optical fiber to achieve data transmission and reception, the network electrical signals and optical signals are converted to each other optoelectronic conversion equipment. Single-fiber bidirectional fiber optic transceiver is more popular in recent years. The advantage is that it can save half of the fiber, the lack of saving half of the fiber is currently no uniform international standards, the compatibility of the products produced by various manufacturers in general, and stability than the dual-fiber products slightly worse. At present, the market fiber optic transceiver or dual-fiber products are mainly.

What is the difference between single-mode single-fiber and single-mode dual-fiber fiber optic transceivers?

Single-mode multi-mode is dependent on the fiber optic cable, single-fiber dual-fiber refers to a core fiber optic transmission or two-core fiber optic transmission; single-mode refers to the use of single-mode fiber optic cables, single-fiber transceiver is only a core, both ends are connected to this core, the transceiver on both sides of the use of different wavelengths of light, so it can be in a core to transmit optical signals. Dual-fiber transceiver is the use of two cores, a send a receive, one end is sent to the other end must be inserted in the mouth of the receipt, that is, the two ends to cross.

Single-mode dual-mode in specific applications, multi-mode usage is higher than single-mode, mainly in the following 500m wiring range, multi-mode has been able to meet, although the performance is not as good as single-mode. Single-mode in more than 500m or higher bandwidth requirements of the environment applications, mostly enterprise-class and other large-scale site applications. Because the fiber optic module work stability and performance is greatly superior to the transceiver, so in the single-mode of this higher performance requirements of the application environment, few companies will use the transceiver, but directly with the module instead of the natural production of single-mode transceiver vendors are fewer, the price is high.

And single-fiber, dual-fiber generally have two ports, and dual-fiber two ports closer, respectively, marked TX, RX, a send, a receive, is specified; single-fiber two ports are generally marked with P1, P2, two ports are able to send and receive, respectively, that is, with a port on the completion of the send and receive, so it is called single-fiber. Optical transceiver TX, RX is on behalf of receiving and sending. Optical transceiver has two kinds: one is single-mode, one is dual-mode, just like the highway if only a single line may traffic jam, if it is a dual line is much smoother, so it is clear that the dual-mode transceiver stability is good point.

Single-fiber is only one fiber connection between the two transceivers can be used, dual-fiber is more common, the need to use two optical fibers, the price of single-fiber slightly higher. Multi-mode transceivers receive multiple transmission modes, transmission distance is relatively close, single-mode transceivers receive only a single mode; transmission distance is relatively far. Although multimode are in the elimination, but because of the lower price of many in the monitoring ah proximity transmission there are still many in use. Multimode transceiver and multimode fiber corresponds to single mode and single mode corresponds to single mode, can not be mixed.