100G BiDi QSFP28 ER1 40km Transceiver (Side A): BIDI-100G-Q28-SL42A

Our EDGEOPTIC BIDI-100G-Q28-SL42A is a multi-vendor compatible 100G BiDi ER1 QSFP28 bidirectional optical module designed for next-generation 100 Gigabit Ethernet applications operating over single-mode fiber infrastructure with single-fiber connectivity and extended reach capability. This quad small form-factor pluggable transceiver utilizes advanced PAM4 (Pulse Amplitude Modulation 4-level) encoding on a single optical lane per direction, delivering 106.25 Gbps throughput for long-distance metro network deployments.

The BIDI-100G-Q28-SL42A module operates using single lambda bidirectional technology with 1304.58nm wavelength for transmission and 1309.14nm wavelength for reception on the same fiber. Our 100G BiDi ER1 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 combines the fiber efficiency of BiDi technology with extended reach capability through optimized optical performance.

Transceiver ensures a 17.7 dB guaranteed optical link budget (AVG), which determines the maximum transmission distance. Over standard single-mode fiber with FEC enabled, the transceiver can reach distances up to 40 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 ER1 40km specification provides extended reach beyond standard 30km ER1 modules for demanding metro deployments.

BIDI-100G-Q28-SL42A compatible 100G BiDi ER1 module is a hot-pluggable QSFP28 with single LC/UPC connector as the optical interface. The electrical interface conforms to IEEE 802.3cu, 100G Lambda MSA, and SFF-8636/SFF-8679 specifications, ensuring compatibility with standard QSFP28 host systems supporting CAUI-4 interface. Our 100G BiDi ER1 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 features integrated FEC (Forward Error Correction) within the DSP, which is essential for PAM4 modulation to detect and correct bit errors, ensuring reliable transmission across the extended 40km reach. The module operates within a 0 to 70°C temperature range with maximum power consumption of 4.5W.

Standards compliance includes IEEE 802.3cu, 100G Lambda MSA, CAUI-4, and SFF-8636/SFF-8679 specifications. Our 100G BiDi ER1 QSFP28 transceiver is CE/RoHS certified.

Important: BiDi transceivers must be deployed in matched pairs with complementary wavelength configurations. This Side A module (Tx 1304.58nm/Rx 1309.14nm) must connect to a Side B module (BIDI-100G-Q28-SL42B) with Tx 1309.14nm/Rx 1304.58nm configuration. Proper pairing ensures correct bidirectional communication over the single fiber strand.

Typical applications include metro network backbone connections, regional carrier interconnects, and extended-reach deployments where fiber conservation and 40km distance capability are both required.

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.