Industrial Campus 25G/100G Three-Layer Ethernet Optical Transceiver Applications

In 2023, with the popularity of Wi-Fi 6 and the emergence of new application needs such as enterprise cloud implementation, current 10g/40g uplink bandwidth from the access layer to the convergence layer of industrial campus network can no longer meet customer needs. As a high-bandwidth, high-density and low-cost solution, the 25g/100g upgrade solution promotes the upgrade of campus network applications. The demand for C-Light 25g/100g optical Transceivers is also emerging.

Table 1 C-LIGHT Transceivers Reach Distance

C-LIGHT provides a complete range of 10G, 25G, 40G, and 100G optical transceiver solutions supporting various fiber types including single-mode fiber (SMF) and multimode fiber (MMF). The products support multiple transmission distances from short-reach data center interconnects to long-distance industrial and enterprise Ethernet networks.

With flexible LC and MPO interface options, C-LIGHT optical transceivers enable customers to upgrade existing fiber infrastructure while reducing network reconstruction costs.

Table 2 Comparison of the Power Consumption of C-LIGHT 10G/25G/40G/100G Optical Transceivers

(The 10km optical transceiver is used as an example)

Compared with traditional 10G and 40G optical transceiver solutions, C-LIGHT 25G SFP28 and 100G QSFP28 optical transceivers provide significantly higher bandwidth while maintaining low power consumption. This makes them ideal for industrial campus networks, enterprise Ethernet upgrades, and high-density switching environments.

C-LIGHT's 25G 100G Optical Transceiver Product Technical Features

Compliance with Technical Standard Agreement

Communication compliant with IEEE 802.3bm, IEEE 802.3bj, IEEE 802.3cc, IEEE 802.3cu;

Interface protocol conforms to SFF-8636, SFF-8665, SFF-8402, SFF-8432 and SFF-8472;

Encapsulation protocol compliant with QSFP28 MSA, SFP28 MSA.

C-LIGHT 25G SFP28 and 100G QSFP28 optical transceivers are designed according to industry standards and multi-vendor interoperability requirements, ensuring reliable integration with mainstream Ethernet switches and optical networking equipment.

Support HOST FEC Technology and SOA Technology

FEC (Forward Error Correction) technology is defined in the IEEE RS-FEC 802.3 bj-2014 standard. It attaches error correction information to the data message at the data sending end, The receiving end uses the error correction information to correct the error code generated in the transmission process of the data message.

This technology can effectively reduce the channel error rate and improve the signal quality, thus extending the maximum transmission distance of the physical medium. But also introduce some transmission delay.

For example, the 25G SFP28 80km product of the optical network has achieved long-distance transmission with the support of FEC technology.

SOA (Semiconductor Optical Amplifier) technology is a technology that uses semiconductor chips to amplify the power of lasers of specific wavelengths.

Due to its small size and low energy consumption, it is conducive to the implementation of pre- or post-amplification functions inside the optical transceiver laser. It is now used in the design and application of high-speed and long-distance optical transceivers in optical networks.

For example, C-LIGHT's 100G QSFP28 XZR 100km product has achieved ultra-long-distance transmission with the support of SOA and FEC technologies.

Supports TX RX Dual CDR Technology

CDR (Clock and Data Recovery) technology refers to recovering the clock information from the received serial data and using the clock information to resample the data signal to obtain stable and reliable data.

This technology can reduce the impact of external interference on the data, reduce the phase error of the signal, and improve the quality of the received signal.

It can also reduce the requirements of the transmission system for wiring and increase the port density.

All 25G and 100G optical transceivers of C-LIGHT use TX RX dual CDR technology to ensure product performance improvement.

Some 100G QSFP28 Products Have Adopted PAM4 Technology

PAM4 (4-level Pulse Amplitude Modulation) uses four different signal levels of 00/01/10/11 to transmit data, and can represent 2 bits of logical information in each symbol period.

Therefore, if the same signal is to be transmitted, the baud rate of data modulated by PAM4 is only half of that of NRZ.

This technology improves the efficiency of the optical transceiver laser and effectively increases the communication rate.

C-LIGHT's 100G QSFP28 single lamda LR1 10km optical transceiver has applied PAM4 technology.

Figure 3 NRZ and PAM4 Level Comparison

Appendix 1: C-LIGHT 100G QSFP28 Optical Transceiver Applications

C-LIGHT provides multiple 100G QSFP28 optical transceiver solutions to support different transmission distances and network application scenarios, including enterprise networks, industrial campus networks, metropolitan area networks, and data center interconnects.

Appendix 2: C-LIGHT 25G SFP28 Optical Transceiver Applications

25G SFP28 optical transceivers provide a cost-effective upgrade path from traditional 10G Ethernet networks to higher bandwidth 25G Ethernet architectures.

Compared with 40G solutions, 25G SFP28 optical modules provide higher port density, lower power consumption, and better flexibility for next-generation industrial campus networks.

Conclusion

With the continuous growth of bandwidth demand from cloud computing, Wi-Fi 6, industrial automation, and digital transformation, 25G and 100G Ethernet optical transceiver solutions have become an important choice for next-generation network upgrades.

C-LIGHT provides a complete portfolio of SFP28 and QSFP28 optical transceivers featuring low power consumption, excellent compatibility, flexible transmission distance, and advanced technologies including FEC, SOA, CDR, and PAM4 modulation.

These solutions help customers build reliable, scalable, and high-performance optical networks for future bandwidth requirements.