An optical module refers to a device that converts electrical signals into optical signals for transmission in an optical fiber communication system, and also converts optical signals into electrical signals for decoding. It is an indispensable part of optical fiber communication and has important functions and significance.According to the appearance and packaging of the optical module, it can be divided into the following forms: SFP, SFP+, SFP28, QSFP+, QSFP28, QSFP-DD, CFP4, CFP2, CFP, XFP, etc.
There are two types of optical modules: BIDI optical module and dual-core optical module. The former is a single-fiber bidirectional optical module that can realize bidirectional transmission on one optical fiber. The latter refers to an optical module with a transmitting port and a receiving port. It uses two optical fibers for transmission. The transmission and reception use different optical cores, which can transmit data in two directions at the same time.
Optical modules are also divided into single mode and multimode. The diameter of the optical core in a single mode optical module is small, usually 9um, and can only transmit a single mode optical signal. It is more suitable for long distance transmission, and its transmission distance can reach dozens of kilometers to hundreds of kilometers. The diameter of the optical core in a multimode optical module is relatively large, usually 50um or 62.5um, which can transmit multiple modes of optical signals at the same time, but the transmission distance is relatively short, generally not exceeding 2 kilometers.
1G SFP optical module is a kind of optical fiber transmission device based on SFP specification, which supports data transmission rate of 1Gbps. It is commonly used to transfer data between network devices, including routers, switches, servers, etc.
There are many types of 1G SFP optical modules, mainly including single mode and multimode. The single mode optical module is suitable for long distance transmission, while the multimode optical module is suitable for short-distance transmission. In addition, there are some differences between different brands and models of 1G SFP optical modules, such as the supported maximum distance, wavelength, interface type, etc., which need to be selected according to specific needs.
The 10G SFP module is a small high-speed optical module for high-speed data transmission in a computer network and can support a data transmission rate of 10Gbps. It usually consists of components such as packages, interfaces, optical transceivers and circuit boards. Transmit data between multi-mode and single mode fiber by connecting to the SFP+ slot of a network device such as a switch or router.
We can check the model of the SFP optical module, usually the model will contain information about the rate of the optical module and other specifications. For example, for Unitekfiber's optical modules, the models starting with "SFP" are usually 1G optical modules, and the models starting with "SFP+" are usually 10G optical modules. Similarly, optical modules of other brands will also have corresponding naming rules.
