The GIGAC Single-Fiber Bidirectional (BiDi) SFP Optical Transceiver Module is an innovative single-fiber optical module that uses WDM (Wavelength Division Multiplexing) technology to enable simultaneous bidirectional data transmission and reception on a single optical fiber strand. At the transmitting end, the optical multiplexer combines signals of two different wavelengths onto a single fiber; at the receiving end, the optical demultiplexer accurately separates and routes these mixed wavelength signals to their respective detectors.

This approach eliminates the need for fiber pairs traditionally required for full-duplex communication, effectively doubling the utilization of existing single-fiber infrastructure and significantly reducing deployment costs. The module features 18 available wavelength pair configurations (from the 1230–1610nm range), supporting data rates of 155Mbps, 622Mbps, 1.25Gbps, and 2.5Gbps — with transmission distances up to 160km depending on the selected model.

All optical components are domestically produced, and the module has passed IEC 61373 vibration and shock testing. It is widelyused in Ethernet switches, routers, and other optical links where fiber conservation is a key operational priority.

Technical Specs Summary：

Place this table immediately below the product title — engineers scan this first.

Key Features：

• Single-fiber bidirectional (BiDi) — transmit and receive on one fiber strand

• WDM technology: optical MUX at TX, optical DEMUX at RX end

• Data rates: 155Mbps, 622Mbps, 1.25Gbps, and 2.5Gbps

• Standard SFP package with LC or SC simplex connector

• Supports hot swapping — no system downtime during replacement

• 3.3V single power supply, CML logic level

• Transmission distance: up to 160km over SMF (model dependent)

• Low EMI and enhanced ESD protection

• Built-in Digital Diagnostic Monitoring (DDM), SFF-8472 compliant

• 18 wavelength pair configurations (1230nm–1610nm range)

• Military Industrial Grade (J): –40°C to +85°C

• Extended Industrial Grade (M): –55°C to +85°C

• Domestically produced optical engine — IEC 61373 vibration tested

Technical Advantages：

Single-Fiber Bidirectional Technology — Halve Your Fiber Costs

Traditional duplex fiber links require two fiber strands — one for TX, one for RX. BiDi technology consolidates both directions onto a single fiber using WDM wavelength separation, immediately halving the fiber count required for any given link. This makes BiDi SFP modules the preferred solution for environments where fiber resources are scarce, expensive to install, or where existing single-fiber runs must be upgraded to support higher traffic loads.

18 Wavelength Pair Configurations

The GIGAC BiDi SFP series offers 18 distinct wavelength pair codes (P3 through E2), covering TX/RX combinations across the 1230nm to 1610nm range. Each wavelength pair is optimized for minimum crosstalk between the transmit and receive channels on the same fiber. This flexibility allows system designers to select the most appropriate wavelength combination for their specific fiber plant and equipment requirements.

Long-Distance Transmission up to 160km

The BiDi SFP series supports transmission distances of 10km, 20km, 40km, 80km, 120km, and 160km, making it suitable for metropolitan ring networks, inter-building campus links, and long-haul backhaul applications where full-duplex data must traverse significant distances over a single fiber span.

Hot-Swap and DDM Real-Time Monitoring

All modules support hot swapping, enabling field replacement without disrupting active network traffic. The built-in DDM interface (SFF-8472) provides real-time monitoring of optical TX/RX power, supply voltage, temperature, and laser bias current — enabling proactive fault detection and reducing mean time to repair (MTTR) in managed network deployments.

Dual Industrial Temperature Grades

Military Industrial Grade (J: –40°C to +85°C) suits standard harsh-environment installations. Extended Industrial Grade (M: –55°C to +85°C) is designed for extreme-cold environments including outdoor cabinets in arctic regions, rail trackside enclosures, and high-altitude telecom installations.

 Typical Applications：

•        Ethernet switches and routers where fiber resources are limited

•        Single-fiber backbone upgrades in existing fiber plant infrastructure

•        Metropolitan area network (MAN) fiber link consolidation

•        Campus inter-building single-fiber connections

•        Data center single-fiber interconnection

•        Fiber access networks and last-mile single-fiber links

•        Industrial automation single-fiber network segments

•        Other optical fiber links requiring fiber conservation

 Compatibility and Deployment：

The GIGAC BiDi SFP series fits standard SFP cages in enterprise and carrier-grade Ethernet switches, routers, and media converters. The DDM interface (SFF-8472) is compatible with standard NMS platforms. Modules are designed for use with ITU-T G.652 compliant single-mode fiber and simplex LC or SC connectors.

For wavelength-specific ordering, replace ** in the model number with the two-digit wavelength pair code from the table below (e.g., P3, P4, G1, Q1, etc.). Always confirm the TX/RX wavelength complement with the far-end device before ordering. Contact our technical team for custom wavelength combinations, paired-module kits, or OEM volume configuration.

 Wavelength Pair Reference Table：

Always verify the TX wavelength at one end matches the RX wavelength at the other end before ordering pairs.

TX and RX wavelengths are interchanged between link ends. Example: Code P3 (TX 1310nm / RX 1550nm) must be paired with a module having TX 1550nm / RX 1310nm at the far end.

Ordering Information：

Replace ** with 2-digit wavelength pair code (P3, P4, P5, P6, P7, P8, G1, G2, Q4, Q1, Q3, R3, R4, R5, S7, S0, E1, E2). J = Military Industrial (–40°C), M = Extended Industrial (–55°C). Specify LC or SC connector.

BiDi modules must be deployed as matched wavelength-complementary pairs. Verify TX/RX wavelength assignments at both link ends before ordering. Contact our technical team for pre-verified paired module kits.

 FAQ Module  ：

Q: What is a BiDi SFP optical transceiver module?

A: A BiDi (bidirectional) SFP module uses WDM technology to transmit and receive data simultaneously on a single fiber strand using two different wavelengths. This eliminates the need for a fiber pair, halving the fiber infrastructure required for a full-duplex link.

Q: How does BiDi SFP differ from standard duplex SFP?

A: Standard duplex SFP uses two separate fibers — one for transmit, one for receive. BiDi SFP uses a single fiber for both directions by splitting TX and RX onto different wavelengths using an internal WDM filter. This is ideal when fiber availability is limited or when upgrading existing single-fiber runs.

Q: Do BiDi SFP modules need to be ordered in pairs?

A: Yes. BiDi SFP modules must be deployed as complementary pairs. The TX wavelength at one end must match the RX wavelength at the other end. For example, if one end uses TX 1310nm / RX 1550nm, the far end must use TX 1550nm / RX 1310nm. Always consult the wavelength pair table before ordering.

Q: What data rates and transmission distances are supported?

A: The GIGAC BiDi SFP series supports 155Mbps, 622Mbps, 1.25Gbps, and 2.5Gbps. Transmission distances range from 10km to 160km over single-mode fiber, depending on the model selected. The 160km variant is available on specific 622Mbps and 1.25Gbps models.

Q: What temperature grades are available?

A: Two grades are available: Military Industrial Grade (J: –40°C to +85°C) and Extended Industrial Grade (M: –55°C to +85°C). Select grade M for deployments in extreme cold environments such as outdoor cabinets in northern climates or high-altitude installations.

Q: What connector types are supported?

A: The BiDi SFP series supports both LC simplex and SC simplex connectors. Specify LC or SC in your order based on your existing fiber plant and patch panel connectivity.

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