100G BiDi QSFP28 LR1 20km Transceiver (Side A): BIDI-100G-Q28-SL20A

Our EDGEOPTIC BIDI-100G-Q28-SL20A is a multi-vendor compatible 100G BiDi LR1 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 metro network and data center interconnect deployments.

The BIDI-100G-Q28-SL20A module operates using single lambda bidirectional technology with 1291nm wavelength for transmission and 1311nm wavelength for reception on the same fiber. Our 100G BiDi LR1 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 9.8 dB guaranteed optical link budget (AVG), 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 LR1 20km specification extends single lambda BiDi reach beyond standard 10km modules for demanding metro deployments.

BIDI-100G-Q28-SL20A compatible 100G BiDi LR1 module is a hot-pluggable QSFP28 with single LC/UPC connector as the optical interface. The electrical interface conforms to IEEE 802.3cd, CAUI-4, and SFF-8679 specifications, ensuring compatibility with standard QSFP28 host systems. Our 100G BiDi LR1 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 20km reach. The module operates within a 0 to 70°C temperature range with maximum power consumption of 4.5W.

Standards compliance includes IEEE 802.3cd, CAUI-4, and SFF-8679 specifications. Our 100G BiDi LR1 QSFP28 transceiver is CE/RoHS certified.

Important: BiDi transceivers must be deployed in matched pairs with complementary wavelength configurations. This Side A module (Tx 1291nm/Rx 1311nm) must connect to a Side B module (BIDI-100G-Q28-SL20B) with Tx 1310nm/Rx 1291nm configuration. Proper pairing ensures correct bidirectional communication over the single fiber strand.

Typical applications include metro network connections, data center interconnects, and campus backbone links where fiber conservation and 20km 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.