In recent years, thanks to the accelerated development of broadband networks, the application of 10G networks has become increasingly widespread. Regarding the 10G SFP+ optical module (the basic transmission equipment of the 10G network), the parameters we need to know are as follows:

1. Center wavelength (nm): There are three main types:

1) 850nm (multimode, low cost but short transmission distance, the maximum transmission distance is 500M);

2) 1310nm (single mode, large loss but small dispersion during transmission, generally used for transmission within 40KM);

3) 1550nm (single-mode, small loss but large dispersion during transmission, generally used for long-distance transmission over 40KM, up to 120KM can be directly transmitted without relay);

2. Transmission rate: refers to the number of bits of data transmitted per second, in bps, commonly used rates include: 155Mbps, 622Mbps, 1.25Gbps, 2.5Gbps, 4Gbps, 8Gbps, 10Gbps, etc. 155M optical module is also called FE (100M) optical module, 1.25G optical module is also called GE (1000M) optical module, 10G SFP+ optical module is the most widely used optical module in optical transmission equipment.

3. Transmission distance: refers to the distance that the optical signal can be directly transmitted without repeater amplification, the unit is kilometers. These are common specs: Multimode 550m, Singlemode 15km, 40km, 80km, 120km, etc.

4. Types of lasers: The laser is the core device in the optical module. It injects current into the semiconductor material and emits laser light through the photonic oscillation and gain of the resonator. Currently, the most commonly used lasers are FP and DFB lasers. The difference between them lies in the semiconductor material and cavity structure. DFB lasers are much more expensive than FP lasers. Optical modules with a transmission distance of less than 40KM generally use FP lasers; optical modules with a transmission distance of ≥40KM generally use DFB lasers;

5. Loss and dispersion: Loss is the loss of light energy due to the absorption, scattering and leakage of the medium when light is transmitted in the fiber. This part of the energy is dissipated at a certain rate as the transmission distance increases. Dispersion is mainly caused by electromagnetic waves of different wavelengths propagating in the same medium at different speeds. Due to the accumulation of transmission distance, different wavelength components of the optical signal arrive at the receiving end at different times, resulting in pulse broadening and inability to distinguish signal values.

These two parameters mainly affect the transmission distance of the optical module. In practical applications, the link loss of a 1310nm optical module is generally calculated at 0.35dBm/km, and the link loss of a 1550nm optical module is generally calculated at 0.20dBm/km. The calculation of the dispersion value is very complicated and is generally for reference only;

6. Transmitting optical power and receiving sensitivity: Transmitting optical power refers to the output optical power of the light source at the transmitting end of the optical module. The receiving sensitivity refers to the minimum value of the received optical power of the optical module at a certain rate and bit error rate. The unit of these two parameters is dBm (the logarithmic form of the power unit MW, 1mw is converted into 0dBm), which is mainly used to define the transmission distance of the product. The optical transmit power and receive sensitivity of optical modules with different wavelengths, transmission rates, and transmission distances will be different.

7. The service life of the optical module: the international unified standard, 7Х24 hours of uninterrupted work for 50,000 hours (equivalent to 5 years);

8. Optical fiber interface: SFP optical modules all have LC interfaces, GBIC optical modules have SC interfaces, and other interfaces include FC and ST;

9. Environmental parameters: working temperature: 0~+70°C; storage temperature: -45~+80°C; working voltage: 3.3V; working level: TTL.

FIBERWDM focused on development and manufacture for the commercial and industrial grade 400G, 200G, 100G, 50G, 40G, 25G, 10G, 1.25G optical transceiver, and 3G/ 12G for HDvideo optical transceiver.

10G SFP + optical fiber transceiver module,supports 10Gb/s and supports 100 km transmission,including: SFP + SR,SFP + LR,SFP + ER,SFP + ZR,etc.Suitable for network switches,PTN,OTN,etc.

The product used in IDC data centers, super-computing datacenters, 5G networks(fronthoul, midhaul, backhaul), OTN/PTN, optical network switch,and other environmental applications.