A Complete Guide to NADDOD's Popular 100G Optical Transceivers

At present, the technology of 100G Ethernet is becoming mature and the deployment of 100G Network by enterprises, institutions and governments has been gradually put on the right track. 100G optical transceiver has the characteristics of high port density, low power consumption and low cost. It is popular with data center and is usually used with 100G switch. NADDOD’s 100G optical transceiver is fully compatible with switches from Cisco, Arista, Juniper and over 140+ vendors, offering a full range of optical transceiver solutions to help users build cost-effective network systems.



NADDOD 100G QSFP28 optical transceivers can satisfy the requirements of different transmission distance: short distance (2km or less), middle distance (2-10km), and long distance (10km or more). At present, among the three kinds of distance, the 2km middle distance occupies the main market share. NADDOD 2km QSFP28 optical transceivers are available in QSFP-100G-PSM4 and QSFP-100G-CWDM4.

NADDOD 2km Middle Distance QSFP28 Optical Transceiver

NADDOD QSFP-100G-PSM4 adopts 4-channel 25G NRZ single-mode parallelism with a maximum transmission distance of up to 2km, which can be used for 100G-100G direct connection and 25G-100G interconnection, the former only requires two QSFP-100G-PSM4 optical transceivers to be inserted into the corresponding 100G switch and connected with single-mode MTP fiber patch cable; The latter requires one QSFP-100G-PSM4 optical transceiver and four 25G SFP28 LR optical transceivers to be plugged into the corresponding 100G and 25G switches and connected with MTP/MPO-LC single-mode branch patch cables.



QSFP-100G-CWDM4 optical transceiver adopts CWDM (Course Wavelength Division Multiplexing) technology, which converts four 25GB/s electrical data input channels into four CWDM optical signal channels, and then multiplexes into a single channel for 100Gb/s optical transmission, conforming to standards specifically developed for 100G data link deployments within 2km of a data center, complementing the high cost gap transmission of the QSFP28 LR4 caused within 2km with a low cost advantage.



The main differences between QSFP-100G-PSM4 and QSFP-100G-CWDM4 are as follows:

QSFP-100G-PSM4 uses MPO-12 optical port because of its PSM4(4-way parallel) transmission technology. The MPO connector required for this optical port has 12 cores of MPO single-mode inserts inside. Compared with other interface connectors, the main characteristics of the MPO connector are compact design and more resource cores.

QSFP-100G-CWDM4 adopts CWDM (Coarse Wavelength Division Multiplexing) technology, which can effectively reduce the cost of fiber resources over middle and long distances by sending and receiving two fibers in one channel. Therefore, QSFP-100G-CWDM4 optical transceiver adopts dual LC interfaces to realize full-duplex signal transmission and achieve optical interface transceiver separation to reduce the complexity of the fiber interface.

NADDOD Short Distance QSFP28 Optical Transceiver

NADDOD QSFP-100G-SR4 optical transceiver uses 4-channel 25G NRZ multimode parallelism with a transmission distance of up to 100m. It is primarily used for data center short-range connections such as 100G direct connections and 25G-100G network upgrades. A 100G direct connection involves inserting two QSFP-100G-SR4 transceivers into the corresponding ports of two 100G switches and then using OM3 or OM4 MPO multimode fiber patch cables to connect the two transceivers. The connection of 25G-100G network upgrade only needs to insert one QSFP-100G-SR4 optical transceiver and four 25G SFP28 SR optical transceivers into 100G and 25G switch ports respectively, and then connect with MTP/MPO-LC multimode harnesses.

NADDOD Long Distance QSFP28 Optical Transceiver

QSFP-100G-LR4, QSFP-100G-ER4 and QSFP-100G-ZR4 use four-channel 25G NRZ wavelength-division multiplexing, which are commonly used in long-distance transmission scenarios, with distances of up to 10km, 40km and 80km, respectively.

QSFP-100G-LR is a single-channel PAM4 modulated optical transceiver with a transmission distance of up to 10km over single-mode fiber. It is suitable for 100G ethernet applications in data centers, high-speed interconnections between switches, routers and transmission devices, server clusters, supercomputing interconnections, and links in core and aggregation networks.



In addition, NADDOD offers 100G QSFP28 dual-rate optical transceivers, including QSFP-100G-LR4 (10km) and QSFP-100G-ER4 (40km). NADDOD 112G QSFP28 dual-rate optical transceivers support 103Gbps (25G per channel) and 112Gbps (28G per channel). This type of optical transceiver is suitable for long-distance and high-performance data communication environments, such as switches and routers interconnecting, data center link aggregation, and more demanding telecommunications applications. QSFP-112G-LR4 can be used in 100GBASE-LR4 Ethernet and OTN networks; QSFP-112G-ER4 can be used in 100GBASE-ER4 ethernet, server interconnection and client 100G telecommunications connections.

NADDOD 100G QSFP28 optical transceiver can meet 100G interconnection scenarios at different distances. QSFP-100G-SR4 optical transceiver (100m) or QSFP-100G-SRBD (150m) can be used for short-range transmission, QSFP-100G-PSM4 or QSFP-100G-CWDM4 (2km) for middle- range transmission; QSFP-100G-LR4 or QSFP-100G-LR optical transceiver (10km) can be used for long-distance transport; QSFP-100G-ER4(40km) or QSFP-100G-ZR4 (80km) for ultra-long- distance transport.