100GBASE LR4 optical transceiver module is a hot-swappable, four-channel laser, full-duplex optical transceiver QSFP28 packaged optical module, designed for single-mode transmission within 10km, wavelengths from 1295nm to 1310nm up to 10km transmission distance.
This module provides an ideal low-cost solution for hyperscale data centers that require certain transmission distances. Moreover, the QSFP 100G LR4 optic module is fully compliant with IEEE 802.3ba(100g ethernet), IEEE 802.3bm, SFF-8665 and SFF-8636 standards.
The 100GBASE LR4 optical module converts four (4) 25Gbps electrical indications into four LAN WDM optical signals, and is also multiplexed into a single channel for 100G optical procedures.
After receiving the 100G optical signal from the opposite end, the module demultiplexes the input signal into 4 channels of 25G LAN WDM optical signals, and then converts the IC and RF circuits into electrical signals for output.
Contents
How Does 100GBASE LR4 Work?
100GBASE LR standard SMF pairs are up to 10 kilometers long, which means single-mode fiber, including duplex LC connectors. With the integrated design of COB to PCBA, it has a mature packaging process in the automatic production process.
The transceiver is compatible with all standards. According to the provisions of 100GBASE LR4, DDM can also be used through the I2C interface to allow monitoring of operating parameters such as temperature, voltage, receive and transmit light power.
With these advantages, this transceiver is suitable for applications such as data center interconnects（DCI）, enterprise core and distribution layers, campus networks, and more.
Features and Specifications
The 4 QSFP28 optics have some similarities, supporting max transmission distance of 10km over OS2. The following table shows the differences.
| Product Number | QSFP28-CWDM4-100G | QSFP28-LR4-100G | QSFP-PSM4-100G | QSFP28-LR4-100G (dual rate) |
| Max. Data Rate | 103.1Gbps(4x 25.78Gbps) | 103.1Gbps(4x 25.78Gbps) | 103.1Gbps(4x 25.78Gbps) | 103.1Gbps(4x 25.78Gbps) 112Gbps(4x 28Gbps) |
| Wavelength | 12716nm 1291nm 1311nm 1331nm | 1295.56nm 1300.05nm 1304.58nm 1309.14nm | 1295.56nm 1300.05nm 1304.58nm 1309.14nm | 1295.56nm 1300.05nm 1304.58nm 1309.14nm |
| TX Power | -6.5~2.5dBm | -4.3~4.5dBm | -5~2dBm | -4.3~4.5dBm @100G -0.6~4dBm @112G |
| Receiver Sensitivity | <-11.5dBm | <-10.6dBm | <-11.4dBm | <-8.6dBm @100G <-8.4dBm @112G |
| Modulation Format | NRZ | NRZ | NRZ | NRZ |
| Power Consumption | 3.5W | 4W | 3.5W | 3.5W |
| Operating Temperature | 0 to 70°C (32 to 158°F) | 0 to 70°C (32 to 158°F) | -40 to 85°C (-40 to 185°F) | 0 to 70°C (32 to 158°F) |
| Packaging Technology | BOX | COB | BOX | BOX |
| Application | Telecom, Data Center, 100G Ethernet | Data Center, 100G Ethernet | Telecom, Data Center, 100G Ethernet | Telecom, Data Center, 100G Ethernet and 112G OTN OTU4 |
| Price | US$ 109.00 | US$ 239.00 | US$ 199.00 | US$ 299.00 |
Conclusion
After introducing these 100G LR4 optical modules, I believe that you already know the details of these modules and how they reach 100G transmission rate. QSFPTEK provides various compatible QSFP28-100G-LR4. Whatsmore, QSFPTEKÂ offers 100G transceivers in a cost-effective price. You will save more than 50% cost for your 100G ethernet project.
