FD SOLUCIONESOPTICAL CONNECTIONS Share a Connection Schedule
HOME / RoHS Single Fiber Bidirectional QSFP

RoHS Single Fiber Bidirectional QSFP

Fibre interconnection and data room reference Published 30 May 2025

Use this reference to prepare product questions for FD SOLUCIONES. Check interfaces, capacity, protection and installation requirements against the current product documentation.

Single-fiber bidirectional QSFP transceivers provide 100G full-duplex connectivity over a single strand of single-mode fiber, enabling high-speed, space-efficient network deployments. OverviewSingle-fiber bidirectional (BiDi) QSFP modules are designed to transmit and receive data over a single strand of single-mode fiber (SMF), effectively halving the fiber count compared to traditional dual-fiber solutions. These modules are commonly used in data centers, metro networks, and carrier aggregation networks where fiber availability or cost is a constraint.

Key Features

Data Rate: Typically 100Gbps full-duplex, often using 4x25Gbps NRZ lanes in QSFP28 form factor. Fiber Type: Single-mode fiber (SMF) is standard, with reach ranging from 20 km to 80 km depending on the module and FEC support. Wavelengths: BiDi modules use LAN WDM or O-band wavelengths to separate transmit and receive signals on the same fiber.

For example, EdgeOptic 100G BiDi QSFP28 Side B transmits on 1295–1309 nm and receives on 1273–1286 nm. Modulation: Low-power NRZ modulation is common for short to medium distances, while coherent optics with dual tunable lasers are used for longer-reach ZR applications. RoHS Compliance: Most modern QSFP BiDi modules, including Cisco and EdgeOptic models, are RoHS-compliant, ensuring they meet environmental and safety standards.

Use Cases

Data Center Interconnect (DCI): Reduces fiber usage while maintaining 100G connectivity between racks or sites. Metro and Regional Networks: Supports long-reach single-fiber links up to 80 km with FEC-enabled modules. Network Upgrades: Enables operators to expand capacity on existing fiber infrastructure without laying additional fiber.

Examples of Modules

Cisco QSFP-100G-B20U4-I / B20D4-I: 100G full-duplex over single SMF up to 20 km, O-band operation, low-power NRZ, operates in pairs.

Edge

Optic BIDI-100G-QSFP28-80B: 100G over single SMF up to 80 km with RS FEC, 4x25Gbps NRZ lanes, LC/UPC simplex interface. Coherent 100G ZR QSFP28: Dual-laser coherent optics for single-fiber 100G ZR applications, IP-over-DWDM, optimized for long-reach aggregation networks.

Advantages

Fiber Efficiency: Halves the number of fibers required for full-duplex links. Cost Savings: Reduces fiber and duct infrastructure costs. Flexibility: Compatible with standard QSFP28 ports and supports both short and long-reach deployments.

Scalability: Supports high-density 100G links in data centers and metro networks. Single-fiber bidirectional QSFP modules are a practical solution for operators seeking high-speed, RoHS-compliant, and fiber-efficient network expansion, offering both short-reach and long-reach options depending on network requirements.

RoHS Single Fiber Bidirectional QSFP - FD SOLUCIONES OPTICAL SYSTEMS [PDF]

RoHS Single Fiber Bidirectional QSFP
100G QSFP28 Cable and Transceiver Modules Data Sheet | FS

It uses single-fibre bi-directional technology to transmit different wavelengths over a single fiber. Multiplexing and demultiplexing of the eight wavelengths are managed within the device.

100G Over Single Fiber, Simplified | ProLabs

Our QSFP28 Bidirectional (Bidi) transceivers delivers high-speed 100G connectivity over a single strand of fiber, with reach options up to 70km and support for both standard and industrial

Industry''s First 100G ZR QSFP28 for Bi-Directional Application

The Coherent 100G ZR QSFP-DCO is the industry''s first dual laser QSFP28 digital coherent optics (DCO) module for single fiber, bi-directional applications – a breakthrough for

Cisco 100GBASE QSFP-100G Modules Data Sheet

Cisco QSFP-100G-SR1.2 The Cisco QSFP 100-Gb SR1.2 Bi-Directional (BiDi) transceiver is a pluggable optical transceiver with a duplex LC connector interface for short-reach data communication and

100G QSFP28 BiDi : Optical Transceiver Module | NEC

NEC''s 100G QSFP28 BiDi optical transceiver enables the transmission and reception of 100Gb/s high-speed data over a single optical fiber. By enabling bidirectional transmission over a single fiber, this

Dual to Single Fiber Solutions | RAD BiDi QSFP28 DD Adaptor

RAD offers dual to single fiber solutions for high-speed, reliable networks. Explore our Bidi QSFP28 adaptors for seamless connectivity.

QSFP, QSFP+, zQSFP, QSFP28 and QSFP56, QSFP

Each channel is capable of transferring data from 10 to 112 Gbps and supports a total of up to 400 Gbps per port. Our QSFP product portfolio includes cages in

100G QSFP28 Single Fiber (BiDi) Modules: Technology, Benefits

100G QSFP28 single fiber (BiDi) modules are a practical, proven method to increase the effective capacity of existing fiber plants, reduce cabling complexity, and optimize total cost of

SFP SFP Plus QSFP Modules: Practical Network Cabling Guide

QSFP-40G-LR4 means QSFP+ (40 GbE), Long Reach, 4 wavelengths (CWDM, single-mode, 10 km). Always check the datasheet for the specific wavelength, fiber type requirement, and maximum

40G QSFP+ SR BiDi VCSEL 850nm/900nm 150m

This product converts XLPPI 4x10G signals into two 20G signals and achieves 40G total bandwidth transmission over two single-fiber bidirectional channels. Each

100G QSFP28 Cable and Transceiver Modules Data Sheet

The QSFP-BX10-100G Module provides 100GBase-BX throughput up to 10km over single-mode fiber (SMF) using a wavelength of 1271nm-TX/1331nm-RX or 1331nm-TX/1271nm-RX

Introduction About BiDi SFP and BiDi Fiber

How Does BiDi SFP Work? As the above-mentioned introduction about BiDi SFP, we have learned the modules separate different transmission wavelengths over a single fiber to achieve

40G BiDi QSFP+ 150m MMF | Two-Fiber | EDGEOPTIC

EDGEOPTIC 40G BiDi QSFP+ transceiver: 150m OM4 multimode fiber, 850/900nm wavelengths, 2dB link budget, 41.25 Gbps. Two-fiber 40G solution, 0-70°C.

40G BiDi QSFP+: Single-fiber Bidirectional Transmission

The interfaces of optical modules are mainly divided into single-fiber bidirectional BiDi and dual-fiber bidirectional (Deplux). In the wavelength division multiplexing system, the line transmission

100GBASE QSFP-100G Modules Data Sheet

The Cisco® 100GBASE Quad Small Form-Factor Pluggable (QSFP) portfolio offers customers a wide variety of high-density and low-power 100

QSFP-100G-SR1.2 QSFP28 100GBASE-SR BiDi 850nm 100m DOM

QSFP-100G-SR1.2 BiDi is a parallel Quad Small Form-factor Pluggable (QSFP28) Bi-Direction optical module that supports 100 Gbps bit rates. The module integrates four host electrical data into two

100G QSFP28 Cable and Transceiver Modules Data Sheet | FS

The QSFP-ER-100G Module is designed for use in100GBASE Ethernet throughput up to 30k mover single mode fiber (SMF) using a wavelength of 1310nm via duplex LC connectors.

Palo Alto Networks PAN-QSFP-40GBASE-BIDI Compatible 40Gbps QSFP+

Palo Alto Networks PAN-QSFP-40GBASE-BIDI compatible optical transceiver is a parallel 40Gbps Quad Small Form-factor Pluggable QSFP+ BIDI module for use in 40GBASE Ethernet network.

Technical note

This reference is intended for preliminary fiber and communications infrastructure research. Optical interface, fiber type, port or core capacity, electrical input and output, enclosure protection, cooling, installation limits and applicable standards must be verified for the specific project.

More Optical Connection References

Bring the Connection Schedule into Focus

Send your panel schedule, optical interfaces, patching requirements and quantities by email or WhatsApp.

Discuss the Connection Scope