{"id":2852,"date":"2022-09-23T06:08:24","date_gmt":"2022-09-23T06:08:24","guid":{"rendered":"https:\/\/www.fibermall.com\/blog\/?p=2852"},"modified":"2022-12-16T06:26:00","modified_gmt":"2022-12-16T06:26:00","slug":"100gbase-sr-bd-optical-transceiver-module-features-and-application","status":"publish","type":"post","link":"https:\/\/www.fibermall.com\/blog\/100g-sr-bd-optical-transceiver-module.htm","title":{"rendered":"100GBASE-SR BD Optical Transceiver Module – Features and Applications"},"content":{"rendered":"

With the rise of cloud computing and 5G networks, data centers tend to develop at higher rates, and the demand for 100G optical transceiver modules is increasing. Nowadays, 100G optical modules occupy a large proportion of the network construction cost. In the application environment within data centers, over 90% of fiber links in small and medium-sized data centers are less than 100 meters long. In large data centers, more than 70% of fiber links are less than 100 meters long, and more than 80% are less than 125 meters long. Multi-mode fiber can meet the needs of most of the links, so the 100G multi-mode module has the greatest demand. The QSFP28 100G multi-mode module has three mainstream solutions: 100GBASE-SR BD, 100GBASE-SR4, 100GBASE-SWDM4, and 100G QSFP28 BiDi SR1.2.<\/p>\n

1. Product specifications<\/b><\/strong><\/span><\/p>\n

Among the three 100G multi-mode modules, 100GBASE-SR4 is the most widely used. The 100G QSFP28 SR4 is a hot-plugged full-duplex optical module with a center wavelength of 850nm and conforms to IEEE 802.3BA standards. It is specially used for short-distance transmission in 100G Ethernet. The 100G QSFP28 SR4 optical module can provide four independent send and receive channels, each of which can operate at a rate of 25Gbps. Using MPO or MTP interface (8-core), the transmission distance is 70m when it is used with OM3 multi-mode fiber, and 100m when it is used with OM4 multi-mode fiber. Its working principle is shown below:<\/p>\n

\"working<\/p>\n

working principle of 100G QSFP28 SR4<\/b><\/strong><\/span><\/p>\n

Different from the 100G QSFP28 SR4, which requires eight optical fibers for transmission, the 100G QSFP28 SR BiDi (Bidirectional) module uses WDM technology to enable each LC port to simultaneously transmit and receive optical signals of different wavelengths from a multi-mode fiber. The two LC interfaces can transmit and receive 100G signals in total. Dual wavelength VCSEL bi-directional optical interface, PAM4 2 \u00d7 50-Gb\/s 850nm\/900 nm. These modules are designed to operate on multi-mode fiber systems using wavelengths of 850nm at one end and 900nm at the other. They can transmit up to 70 meters when used with OM3 fiber patch cable, up to 100 meters when used with OM4 fiber patch cable, and up to 150 meters when used with OM5 fiber patch cable. The working principle is as follows.<\/p>\n

\"working<\/p>\n

working principle of 100G QSFP28 SRBD<\/b><\/strong><\/span><\/p>\n