100G QSFP28 BiDi ER1-40 40km PAM4 Optical Transceiver 1304nm/1309nm Simplex LC

• Supports 100GBASE-ER1-40 BiDi Ethernet applications
• Enables 100Gb/s bidirectional transmission over a single strand of SMF
• Supports transmission distances up to 40km
• Uses 1304nm and 1309nm wavelength pairing for BiDi operation
• Adopts PAM4 modulation technology for high-speed optical transmission
• Integrated EML laser transmitter for stable long-distance transmission
• High-performance APD receiver for improved optical sensitivity
• QSFP28 hot-pluggable form factor for high-density network deployment
• Supports CAUI-4 electrical interface with 4 × 25.78Gb/s NRZ lanes
• Equipped with Simplex LC optical connector for single-fiber infrastructure
• Supports I2C digital diagnostic monitoring (DDM)
• Operates with a single +3.3V power supply
• Low power consumption with maximum 4.5W operation
• Supports standard 0°C to +70°C operating temperature range

• 100GBASE-ER1-40 BiDi Ethernet networks
• Long-distance data center interconnects (DCI)
• Telecom backbone and metro networks
• Fiber resource-limited network deployments
• Enterprise and campus backbone connections
• Optical transport network upgrades
• High-density 100G switch and router interconnections

We provide OEM and customized 100G QSFP28 BiDi ER1-40 optical transceiver solutions to support different customer requirements and network environments. Customization services include firmware optimization, label and housing customization, wavelength configuration, optical performance tuning, and compatibility testing with specific networking equipment.

For telecom operators, system integrators, and enterprise customers, we can provide tailored solutions for special deployment conditions, including extended temperature operation, customized diagnostics functions, and platform-specific interoperability testing.

What makes a 100G BiDi ER1-40 transceiver different from a standard 100G ER4 module?

A 100G BiDi ER1-40 transceiver uses a single-fiber bidirectional architecture, transmitting and receiving signals through one fiber using different wavelengths. A traditional ER4 module typically requires duplex fiber with separate transmit and receive paths, making BiDi modules more suitable for fiber-constrained environments.

Why are APD receivers used in this 40km BiDi transceiver?

APD receivers provide higher optical sensitivity compared with standard PIN receivers, making them suitable for long-distance transmission where optical signal attenuation is more significant, such as 40km single-mode fiber links.

Can this module be deployed on existing single-mode fiber networks?

Yes. The module is designed for single-mode fiber infrastructure and uses a Simplex LC optical interface, allowing operators to maximize existing fiber resources without installing additional fiber pairs.

Is the electrical interface compatible with standard QSFP28 ports?

Yes. The module adopts the standard QSFP28 form factor and CAUI-4 electrical interface with four 25.78Gb/s NRZ lanes, allowing deployment in compatible 100G Ethernet switches and routers.

What monitoring functions are available through the I2C interface?

The I2C management interface provides digital diagnostics monitoring, enabling access to important operating parameters such as temperature, voltage, optical transmit power, receive power, and module status information.