100G CWDM4 QSFP28 2km Transceiver: 100G-QSFP28-2.1

Our EDGEOPTIC 100G-QSFP28-2.1 is a multi-vendor compatible 100G CWDM4 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 coarse wavelength division multiplexed optical lanes at 25 Gbps each, delivering aggregate throughput up to 103.125 Gbps for cost-effective short-reach single-mode fiber deployments.

The 100G-QSFP28-2.1 module operates using CWDM technology with four discrete wavelength channels at 1271nm, 1291nm, 1311nm, and 1331nm, employing NRZ (Non-Return to Zero) modulation for signal encoding. On the transmission side, module converts four electrical input channels into four optical lanes and multiplexes them into a single fiber for 100G optical transmission. Reversely on the receiver side, module optically demultiplexes input signal into four lanes and converts them to electrical data. Our 100G CWDM4 QSFP28 transceiver utilizes DML (Directly Modulated Laser) array for transmission and PIN photodiode array for receiving.

Transceiver ensures a 3.5 dB guaranteed optical link budget, which determines the maximum transmission distance. Over standard single-mode fiber, the transceiver can reach distances up to 2 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 duplex fiber configuration with wider CWDM channel spacing provides cost advantages over LAN WDM solutions for shorter reach applications.

100G-QSFP28-2.1 compatible 100G CWDM4 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 CWDM4 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 100G CWDM4 MSA, 100G CLR4 Alliance, and QSFP28 MSA specifications. The transceiver supports multi-protocol operation including 100G Ethernet (103.125 Gbps), 4x 32G Fiber Channel (112.2 Gbps), and OTU4 (112 Gbps) for optical transport networks. 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 CWDM4 QSFP28 transceiver is CE/RoHS certified, Class 1 FDA and IEC60825-1 Laser Safety Compliant.

Typical applications include data center interconnects, Internet Service Provider aggregation networks, mobile operator core networks, and storage area network deployments. The CWDM4 design provides economical alternative to LAN WDM for 2km reach requirements while maintaining duplex fiber simplicity.

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.