100G-DR Single Lambda QSFP28 500m Transceiver: 100G-QSFP28-SL500

Our EDGEOPTIC 100G-QSFP28-SL500 is a multi-vendor compatible 100G-DR Single Lambda QSFP28 optical module designed for next-generation 100 Gigabit Ethernet applications operating over single-mode fiber infrastructure. This quad small form-factor pluggable transceiver utilizes advanced PAM4 (Pulse Amplitude Modulation 4-level) encoding on a single optical lane, delivering 106.25 Gbps throughput for high-density data center leaf-spine architectures and short-reach interconnects.

The 100G-QSFP28-SL500 module operates at 1310nm wavelength using single lambda technology with PAM4 modulation, representing a significant evolution from traditional NRZ-based 4x25G architectures. Our 100G-DR QSFP28 transceiver utilizes EML (Electro-absorption Modulated Laser) for transmission and PIN photodiode for receiving, with integrated CDR (Clock and Data Recovery) circuitry to maintain signal integrity at PAM4 data rates. This architecture delivers 100G capacity over just two fibers instead of eight required by parallel SR4 or PSM4 solutions.

Transceiver ensures a 3 dB guaranteed optical link budget, which determines the maximum transmission distance. Over standard single-mode fiber with FEC enabled, the transceiver can reach distances up to 500 meters. However, distance is just an indicative parameter calculated for comfort of identification – eventually we calculate distance taking into account minimal optical budget and average attenuation of optical cabling in industry. The single lambda design dramatically simplifies cabling infrastructure while providing single-mode fiber reach advantages over multimode solutions.

100G-QSFP28-SL500 compatible 100G-DR module is a hot-pluggable QSFP28 with dual LC/UPC connectors as the optical interface. The electrical interface conforms to SFF-8636 and SFF-8665 MSA (Multi-Source Agreement) specifications, ensuring compatibility with standard QSFP28 host systems supporting multiple vendor equipment platforms. Our 100G-DR QSFP28 transceiver can be encoded to be compatible and successfully operate in different 80+ brands of equipment.

The module incorporates DDM/DOM (Digital Diagnostic Monitoring) functionality providing real-time information including transmitted and received optical power levels, module temperature, bias current, and supply voltage. The module supports Host FEC (Forward Error Correction) function which is essential for PAM4 modulation to detect and correct bit errors, ensuring reliable transmission. The module operates within a 0 to 70°C temperature range with maximum power consumption of 4.5W, with appropriate thermal considerations for sustained operation in controlled data center environments.

Standards compliance includes IEEE 802.3cd for 100 Gigabit Ethernet 100GBASE-DR specification, 100G Lambda MSA, and QSFP28 MSA. The transceiver achieves multi-vendor interoperability through adherence to industry MSA standards, though equipment with vendor-specific module validation may require custom EEPROM programming for compatibility. Our 100G-DR QSFP28 transceiver is CE/RoHS certified, Class 1 FDA and IEC60825-1 Laser Safety Compliant.

Typical applications include data center leaf-spine interconnects, top-of-rack to spine connections, and high-density deployments where fiber count reduction is critical. The single lambda PAM4 design represents the foundation for next-generation 400G and 800G architectures using multiple 100G lanes.

Because our focus is providing top quality service, we are performing serious quality checks before delivery of our products. As a result, we do optical parameter measurements, connector cleanliness tests and QSFP28 transceiver EEPROM memory data validation tests.