100GBASE-LR4 QSFP28 20km Transceiver: 100G-QSFP28-20

Our EDGEOPTIC 100G-QSFP28-20 is a multi-vendor compatible 100GBASE-LR4 QSFP28 optical module designed for 100 Gigabit Ethernet, OTN, and Fiber Channel applications operating over single-mode fiber infrastructure. This quad small form-factor pluggable transceiver utilizes four wavelength division multiplexed optical lanes at 25 Gbps each, delivering aggregate throughput up to 112 Gbps for extended-reach data center interconnect and metro network deployments.

The 100G-QSFP28-20 module operates using LAN WDM technology with four discrete wavelength channels at 1295.56nm, 1300.05nm, 1304.58nm, and 1309.14nm, employing NRZ (Non-Return to Zero) modulation for signal encoding. Our 100GBASE-LR4 QSFP28 transceiver utilizes EML (Electro-absorption Modulated Laser) array for transmission and PIN photodiode array for receiving. This optical architecture enables full-duplex 100G transmission over a single fiber pair by multiplexing four independent channels within the 1310nm wavelength window.

Transceiver ensures a 9 dB guaranteed optical link budget, which determines the maximum transmission distance. Over standard single-mode fiber, the transceiver can reach distances up to 20 kilometers. 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 enhanced optical budget compared to standard 10km LR4 modules provides additional margin for challenging fiber plant conditions or extended reach requirements.

100G-QSFP28-20 compatible 100GBASE-LR4 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 100GBASE-LR4 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. Additionally, the module supports Host FEC (Forward Error Correction) function which helps the receiving side detect and correct bit errors, improving overall link quality. The module operates within a 0 to 70°C temperature range with maximum power consumption of 3.5W, with appropriate thermal considerations for sustained operation in controlled data center environments.

Standards compliance includes IEEE 802.3ba and IEEE 802.3bm for 100 Gigabit Ethernet 100GBASE-LR4 specification and QSFP28 MSA. The transceiver supports multi-protocol operation including 100G Ethernet (103.125 Gbps), 128GFC Gen 6 Fiber Channel (112.2 Gbps), and OTU4 (112 Gbps) for optical transport networks. Our 100GBASE-LR4 QSFP28 transceiver is CE/RoHS certified, Class 1 FDA and IEC60825-1 Laser Safety Compliant.

Typical applications include data center site interconnections, Internet Service Provider backbone and aggregation networks, mobile operator core networks, and enterprise campus connections requiring extended reach beyond standard 10km LR4 specifications. The 20km reach capability addresses deployments where standard LR4 distance is insufficient but ER4 power consumption is undesirable.

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.