40G/100G SWDM4 QSFP28 Multi-Rate Transceiver: SWDM4-40-100G-Q28-440

Our EDGEOPTIC SWDM4-40-100G-Q28-440 is a multi-vendor compatible 40G/100G SWDM4 QSFP28 multi-rate optical module designed for Ethernet applications operating over multimode fiber infrastructure with duplex fiber connectivity. This quad small form-factor pluggable transceiver utilizes shortwave wavelength division multiplexing technology with four wavelength channels, delivering up to 103.125 Gbps throughput while providing backward compatibility with 40G Ethernet deployments.

The SWDM4-40-100G-Q28-440 module operates using SWDM technology with four discrete wavelength channels at 850nm, 880nm, 910nm, and 940nm, employing NRZ (Non-Return to Zero) modulation for signal encoding. On the transmission side, module converts four electrical input channels into four optical wavelengths and multiplexes them into a single fiber for optical transmission. Reversely on the receiver side, module optically demultiplexes input signal into four lanes and converts them to electrical data. Our 40G/100G SWDM4 QSFP28 transceiver utilizes VCSEL (Vertical-Cavity Surface-Emitting Laser) array for transmission and PIN photodiode array for receiving.

Transceiver ensures a 2.2 dB guaranteed optical link budget, which determines the maximum transmission distance. Over OM5 multimode fiber optimized for wideband SWDM transmission, the transceiver can reach distances up to 440 meters at 40G operation and approximately 150 meters at 100G operation. 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 SWDM4 design reduces fiber requirements by 75% compared to parallel SR4 while maintaining multimode fiber compatibility.

SWDM4-40-100G-Q28-440 compatible 40G/100G SWDM4 module is a hot-pluggable QSFP28 with dual LC/UPC connectors as the optical interface. The electrical interface conforms to SFF-8636 and QSFP28 MSA (Multi-Source Agreement) specifications, ensuring compatibility with standard QSFP28 host systems supporting CAUI-4 interface. Our 40G/100G SWDM4 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.

Standards compliance includes IEEE 802.3bm, CAUI-4, SWDM MSA, and QSFP28 MSA specifications. The multi-rate capability accommodates both 40G Ethernet (41.25 Gbps) and 100G Ethernet (103.125 Gbps) operation, providing operational flexibility for network migrations and mixed-speed deployments. Our 40G/100G SWDM4 QSFP28 transceiver is CE/RoHS certified.

Typical applications include data center infrastructure upgrades from 40G to 100G, mixed-speed network deployments, and environments where LC-based duplex connectivity with extended multimode reach is preferred over MPO parallel solutions. The dual-rate SWDM4 technology provides investment protection during network speed transitions.

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.