1.25G SFP Dual-Fiber

Key Features

• Data rate up to 1.25Gbps
• Dual-fiber / duplex transmission
• Standard SFP form factor
• Duplex LC optical interface
• Available for single-mode or multimode fiber
• Multiple transmission distances available
• Supports 1000BASE-X / Gigabit Ethernet applications
• SFP MSA compliant
• IEEE Ethernet standards compatible
• Optional DDM/DOM monitoring
• Hot-pluggable design
• Commercial and industrial temperature options
• Multi-vendor compatibility programming available
• RoHS-compliant options available

Dual-Fiber Optical Transmission

Unlike BiDi SFP modules that transmit and receive over a single fiber, the 1.25G Dual-Fiber SFP uses two separate optical fibers:

• Fiber 1: TX — optical transmission
• Fiber 2: RX — optical reception

This duplex architecture provides a straightforward and widely deployed solution for connecting Gigabit Ethernet switches, routers, media converters, and other optical network equipment.

Flexible Transmission Distances

HIPHOTONICS provides different optical configurations to support various network distances.

Typical options include:

The actual transmission distance depends on the selected optical budget, fiber attenuation, connectors, splices, and overall link loss. Commercial 1.25G dual-fiber modules are available in configurations such as 10km and 20km over 9/125μm single-mode fiber.

Multiple Wavelength Options

Different wavelengths can be selected according to the required transmission distance and fiber configuration.

Common configurations include:

• 850nm — typically used for multimode short-distance applications
• 1310nm — widely used for single-mode Gigabit Ethernet
• 1550nm — suitable for extended-reach applications

For example, a 1000BASE-LX 1.25G module can use 1310nm optics and support up to 10km or 20km over single-mode fiber depending on the optical design.

DDM / DOM Monitoring

The optional Digital Diagnostic Monitoring (DDM/DOM) function enables network administrators to monitor key operating parameters through the host equipment.

Depending on the selected module, monitored parameters can include:

• Module temperature
• Supply voltage
• Laser bias current
• Transmit optical power
• Receive optical power

This provides additional visibility for network maintenance and troubleshooting. 1.25G commercial SFP modules with DDM are available for 1000BASE-LX applications.

MSA-Compatible Design

The module is designed around the standard SFP form factor and can be supplied with SFP MSA-compatible EEPROM and interface configurations.

HIPHOTONICS can also provide multi-vendor compatibility programming according to the customer's equipment requirements, including network switches, routers, media converters, and other SFP-enabled devices.

Typical Applications

Enterprise Networks

Used to establish Gigabit Ethernet fiber links between network switches, routers, and aggregation equipment.

Telecommunications Networks

Suitable for fiber access networks, metropolitan networks, and communication infrastructure.

Video Surveillance

Provides fiber connectivity for IP surveillance systems where long-distance and stable Gigabit Ethernet transmission is required.

Data Communication

Suitable for connecting servers, switches, storage equipment, and other network devices.

Industrial Networking

Industrial-temperature versions can be selected for applications requiring a wider operating temperature range.

Technical Specifications

Specifications vary according to the selected wavelength, transmission distance, fiber type, and temperature grade. Please refer to the specific model datasheet for final optical parameters.

Why Choose HIPHOTONICS 1.25G SFP?

HIPHOTONICS provides 1.25G SFP Dual-Fiber modules for telecom operators, distributors, system integrators, security companies, and network equipment manufacturers.

We can support customized requirements including:

• Transmission distance
• Fiber type
• Wavelength
• DDM/DOM
• Operating temperature
• Connector type
• OEM labeling
• Compatibility programming
• Customized packaging

Whether you need 10km, 20km, 40km or other transmission distances, HIPHOTONICS can provide suitable 1.25G SFP solutions for your network deployment.

Contact HIPHOTONICS for datasheets, compatibility confirmation, samples, and volume quotations.