of QSFP28 optical modules are there?

QSFP28 optical module can be said to be a new generation of optical module, which is favored by many manufacturers because of its advantages such as small size, high port density, and low power consumption. So, what types of QSFP8 optical modules are there?
QSFP28 optical module is also known as 100G optical module. It is an important part of 100G network. It is mainly used in 100G Ethernet and EDR InfiniBand applications. It uses four 25Gbit/s transmission channels to transmit data.
The following is an introduction to the types of QSFP28 optical modules:
1: QSFP28SR4 optical module
QSFP28SR4 optical module is also known as 100GBASE-SR4QSFP28 optical module. Since most of the data centers use multi-mode optical fiber, IEEE has developed a standard for 100GQSFP28 optical module that specifically supports multi-mode optical fiber short-distance transmission applications: 100GBASE-SR4 . QSFP28SR4 optical module adopts MTP interface (8 cores), the transmission distance when used with OM3 multimode fiber is 70m, and the transmission distance when used with OM4 multimode fiber is 100m, suitable for short distance transmission, QSFP28SR4 optical module belongs to parallel 100G The optical module has the advantages of high port density and low cost.

The product features are as follows:
(100GQSFP28SR4100m optical module)
4-channel full-duplex transceiver module
Transfer rate up to 26Gbps per channel
Support 40GE and 56GEFDR two rates
4-channel 850nm VCSEL array
4-channel PIN photodetector array
Receiver and transmitter built-in CDR circuit
Support CDR bypass
Low power consumption<2.5W
QSFP hot-swappable package
The maximum transmission distance of OM3 multimode fiber (MMF) is 70m, and OM4MMF is 100m
Fiber interface accepts single MPO
Built-in digital diagnostics
Working temperature 0℃~70℃
3.3v supply voltage
Meet RoHS-6 (lead-free)

2: QSFP28LR4 optical module
QSFP28LR4 optical module is also called 100GBASE-LR4QSFP28 optical module. For 100G long-distance transmission, IEEE has formulated 100GBASE-LR4 standard for 100GQSFP28 optical module. The QSFP28LR4 optical module also uses 4 fiber channels. The difference is that it introduces WDM technology, which can multiplex the different wavelengths of the 4 fiber channels into one optical fiber for transmission. Therefore, the QSFP28LR4 optical module uses a duplex LC interface. , the transmission distance can reach 10km when used with single-mode fiber, which provides a solution for the increasing transmission distance demand of super-large data centers.

The product features are as follows: (100GQSFP28LR44KM optical module)
.4-channel full-duplex transceiver module
The transmission data rate per channel is 26Gbps
4x26Gb/s DFB-based WDM 4-channel transmitter for metropolitan area network
Receiver and transmitter circuit channel with built-in CDR
Low power consumption<3.5w
Hot-swappable QSFP package
Transmission distance up to 4 km on G.652 single-mode fiber
Double LC optical interface
Built-in digital diagnostic function
Working temperature 0°C+70°C
3.3v supply voltage
Meet RoHS6 (lead-free)

3: QSFP28PSM4 optical module
QSFP28PSM4 optical module is also known as 100GBASE-PSM4QSFP28 optical module, which has a hot-swappable QSFP shape, built-in digital diagnostic function, and has the advantages of high speed and low power consumption. 100GBASE-PSM4 is a multi-source agreement (MSA), which is mainly formulated for 100GQSFP28 optical modules. QSFP28PSM4 optical module is mainly used for medium and long-distance transmission applications. It adopts MTP interface. When used with single-mode multi-core optical fiber, the transmission distance can reach 500m, and it has eight optical fibers, and the data rate of each optical fiber is 25Gbps.

The product features are as follows: (100GQSFP28PSM42km optical module)
4-channel full-duplex fiber optic transceiver module
The transmission data rate per channel is 26Gbps
4 channels 1310nm
.4-channel PIN photodetector array
.Built-in CDR circuit at receiver and transmitter
.Support CDR shunt circuitous
.Low power consumption<3.5w
.Hot-swappable QSFP package
.Transmit 2KM on G.652 single-mode fiber
.Single-mode MPO (APC8 degree) connector socket
.Built-in digital diagnostic function
.Working temperature 0°C+70°C
.3.3v supply voltage
.Meet RoHS6 (lead-free)
4: QSFP28CWDM4 optical module
QSFP28CWDM4 optical module is also known as 100GBASE-CWDM4QSFP28 optical module, mainly used in computing, high-frequency trading and other fields, 100GBASE-CWDM4 is also a multi-source agreement (MSA), QSFP28CWDM4 optical module also introduces WDM technology, using LC duplex Interface, when used with single-mode fiber, the transmission distance can reach 2km.

The product features are as follows: (100GQSFP28CWDM42KM optical module)
.4-channel full-duplex optical module
.Transfer rate up to 26Gbps per second
.4x26Gb/s DFB-based CWDM unc