Lumopt Lumopt

Optical Transceivers 1.25G SFP Module Manufacturers & Exporter

Global High-Reliability Optical Transmission Solutions • Enterprise & Industrial Grade SFP Engineering • Custom OEM/ODM Capabilities

Premium 1.25G SFP Modules

High-performance optical transceivers engineered for enterprise-grade telecommunications and high-speed data transmission networks.

1310nm-TX/1550nm-RX Simplex LC Bidirectional Fiber Optic Transceivers

1310nm-TX/1550nm-RX Simplex LC Bidirectional Fiber Optic Transceivers Module Single Mode 1G Bidi SFP 20km

View Technical Specs
Multimode Dual LC Optical Transceiver MMF 850nm

Multimode Dual LC Optical Transceiver MMF 850nm 1.25G SFP Fiber Optic Module 550m

View Technical Specs
Duplex LC SMF Fiber Optic Transceiver Single Mode

Duplex LC SMF Fiber Optic Transceiver Single Mode 1310nm 1.25G SFP Optical Module 10km

View Technical Specs
1000BASE-ZX Mini Gbic Fiber Optical Transceiver

1000BASE-ZX Mini Gbic Fiber Optical Transceiver Single Mode 1550nm 1G SFP Module 80km

View Technical Specs
1000BASE-SX SFP Ethernet Module

1000BASE-SX SFP Ethernet Module 850nm 550m Duplex LC MMF Fiber Optical Transceiver

View Technical Specs
1000BASE-T SFP 1310nm 2km Duplex LC

1000BASE-T SFP 1310nm 2km Duplex LC MMF Optical Fiber Transceiver Module

View Technical Specs
1000BASE-LX/LH SFP Module

1000BASE-LX/LH SFP Module 1310nm 10km DOM Duplex LC SMF Optical Transceiver

View Technical Specs
1000BASE-LX/LH SFP Transceiver

1000BASE-LX/LH SFP Transceiver 1310nm 20km Duplex LC SMF Optical Module

View Technical Specs
100%
Full Compatibility Tested
<0.01%
Field Return Rate
160km
Max Transmission Distance
Class 100K
Cleanroom Manufacturing

The Strategic Role of 1.25G SFP Modules in Modern Telecommunications

In the rapidly advancing era of multi-gigabit networks, hyperscale cloud data centers, and terabit-level AI processing platforms, the 1.25G SFP (Small Form-factor Pluggable) optical transceiver remains a cornerstone of global communication infrastructure. While higher-speed interfaces like 100G, 400G, and 800G dominate backbone networks, the 1.25G SFP module remains the unsung hero at the access layer, enterprise networks, smart city surveillance nodes, and industrial automation control loops.

As a leading 1.25G SFP module manufacturer, Lumopt Opto Technology Co., Ltd. (registered in China as Luguang Communication Technology Co., Ltd.) understands the technical nuances and operational requirements of legacy and greenfield installations. Selecting the right optical transceiver is not just a procurement decision; it is a critical step in securing high uptime, signal integrity, and system lifetime value.

Information Gain Concept: Unlike standard distributors who resell generic transceivers, an experienced manufacturer provides direct physical-layer engineering insights, such as custom EEPROM coding to bypass vendor lock-in, proprietary optical sub-assembly (OSA) design to withstand extreme thermal variations, and strict adherence to the MSA (Multi-Source Agreement) standards.

Understanding Wavelength Configurations & Power Budgets

To architect a resilient network, engineers must match the correct transceiver specification with the fiber physical media. Lumopt manufactures a comprehensive matrix of 1.25G SFP modules to suit different distance configurations and fiber infrastructures:

Multimode (MMF) Transceivers
Operating at 850nm or 1310nm wavelengths using dual LC connectors, these modules support transmission distances up to 550m. They utilize cost-effective VCSEL transmitters and are ideal for intra-building structured cabling systems and campus networks.
Single-mode (SMF) Duplex Modules
Utilizing 1310nm or 1550nm lasers, these transceivers offer significantly lower attenuation, enabling standard transmission ranges of 10km, 20km, 40km, and up to 160km (1000BASE-ZXC class). Ideal for metropolitan networks (MAN) and backhaul links.
Bidirectional (BiDi) Simplex SFP
By deploying Wavelength Division Multiplexing (WDM), BiDi modules transmit and receive over a single strand of fiber (typically pairing 1310nm-TX/1550nm-RX and vice-versa). This effectively doubles the capacity of existing fiber infrastructure.

Digital Optical Monitoring (DOM) / Digital Diagnostic Monitoring (DDM)

Modern telecommunications architecture requires real-time diagnostic parameters to ensure system health and minimize downtime. Our 1.25G SFP transceivers feature advanced DDM/DOM functionality (compliant with SFF-8472). DDM allows network operators to monitor parameters including optical output power, optical input power, internal transceiver temperature, laser bias current, and transceiver supply voltage. System administrators can set alarm thresholds, preempting fiber line degradation and laser degradation before catastrophic failures occur.

Lumopt Opto: Precision Manufacturing & Industrial Control

Under the registered corporate entity Luguang Communication Technology Co., Ltd., we combine Chinese supply chain efficiency with rigid quality controls.

Lumopt operates a dust-free production workshop, utilizing state-of-the-art automation and manual validation setups. Every optical transceiver undergoes exhaustive testing phases—from circuit design verification to environmental stress profiling. The strength of a Chinese direct manufacturer lies not just in raw production volume, but in the efficiency of the integrated supply chain. Our raw optical sub-assemblies (TOSA/ROSA), laser diode chips, and printed circuit board assemblies (PCBAs) are sourced, tested, and assembled within our controlled production ecosystem.

Our Specialized Assembly & Quality Inspection Workflow

Twisting Process
Twisting
PCB Tinned
PCB Tinned
Soldering
Soldering
Shear LED Pin
Shear-LED-Pin
Semi-finished Testing
Semi-finished Testing
Plastic Case Assembly
Plastic-Case-Assembly
Hi-pot Testing
Hi-pot Testing
Integrated Testing
Integrated-Testing
Final Inspecting
Final Inspecting
Packing
Packing

Advanced Instrumentation & Precision Test Machinery

Comprehensive Tester
Comprehensive Tester
LED Lamp Tester
LED Lamp Tester
Hi-Pot Tester
Hi-Pot Tester
Automatic Welding Machine
Automatic Welding Machine
Laser Marking Machine
Laser Marking Machine
Transformer Automatic Tester
Transformer Automatic Tester
Transformer Automatic Packing Machine
Transformer Automatic Packing Machine
RJ45 Automatic Tester
RJ45 Automatic Tester
Production Process Image
Production Process
Quality Inspection Process
Quality Inspection

Every batch of 1.25G SFPs undergoes strict testing on original destination hardware. We write customized EEPROM signatures for full compliance with systems from Cisco, Juniper, HP, Huawei, Arista, and other leading brands. Our testing process is rigorous, and each module must meet performance benchmarks before it is approved for packing.

Lumopt Dust-Free Production Facility

Global Procurement Landscapes & The Longevity of Gigabit Ethernet

International buyers often face a dilemma: Should they upgrade their entire network to 10G SFP+ or retain their current 1G SFP infrastructures? For many enterprise LAN, security surveillance, and industrial edge installations, upgrading is unnecessary and costly. A 1.25G optical link provides sufficient bandwidth for voice, low-latency control data, and standard IP video streams while consuming less power and requiring less expensive routing hardware.

The longevity of the 1.25G SFP module lies in its balance of performance, power, and cost. In regions like North America, Europe, and Latin America, network administrators continue to deploy 1.25G SFPs for local loops and distributed networks.

Key Drivers for 1G Optical Systems in Industry:

  • Cost Efficiency: The pricing of 1.25G SFP chips and components has stabilized, making bulk deployments cost-effective.
  • Reduced Thermal Envelope: 1.25G modules consume less power than their 10G or 25G counterparts, minimizing heat dissipation requirements in outdoor cabinets.
  • Legacy System Architecture: Many industrial controllers and older field switches only have SFP ports, meaning 1G modules remain essential.

Optimized OEM & ODM Customization

As a dedicated exporter, Lumopt customizes transceivers to match specific client needs. We can adjust laser transmission levels, adjust receiver sensitivities, and modify firmware signatures to bypass strict vendor locks on proprietary switches. This flexibility makes Lumopt a reliable partner for system integrators, distributors, and bulk purchasers globally.

Target Application Scenarios for 1.25G SFP Modules

Different network topographies require specific transceiver configurations. Understanding these variations helps ensure the selected transceiver operates reliably over its service life.

Enterprise Local Area Networks (LAN)
Standard single-mode duplex SFP modules (10km or 20km) are commonly used to link core network switches to wiring closets or separate buildings. This provides reliable gigabit bandwidth across campus networks.
Metropolitan Area Networks (MAN)
For citywide networks, single-mode transceivers operating over long distances (such as 40km, 80km, or up to 160km) bypass the need for intermediate repeaters, reducing infrastructure costs.
Fiber-To-The-Home (FTTH) Backhaul
BiDi (Bidirectional) SFP modules are key for FTTH networks. Because they transmit and receive on a single fiber core, they allow operators to serve more end users without laying additional cable.

For industrial automation, our ruggedized transceivers operate across an extended temperature range (-40°C to 85°C). This allows them to handle the high temperatures of traffic management cabinets, substations, and outdoor field nodes.

Future Outlook: The Role of 1.25G in an Era of High-Speed Demands

As technologies transition toward 100G, 400G, and even 1.6T, legacy systems continue to co-exist with high-speed options. A complete network overhaul is often unnecessary; a hybrid model that uses 1.25G SFPs for edge devices and high-speed links for core routing is often more practical.

Lumopt is committed to sustaining production lines for legacy optical transceivers. We continue to invest in improving 1.25G production efficiency and reducing the optical components' power footprint. We aim to help global networks remain reliable and cost-effective as they scale.

Frequently Asked Questions

Answers to technical and commercial questions about 1.25G SFP transceivers.

What is the difference between single-mode and multimode 1.25G SFP transceivers?
Single-mode SFP transceivers (SMF) feature a narrow core (typically 9um) and utilize 1310nm or 1550nm lasers to transmit signals over long distances (from 10km up to 160km). Multimode transceivers (MMF) have a larger core (50um or 62.5um) and use 850nm or 1310nm VCSELs, which are suitable for short ranges (up to 550m).
Why is DDM/DOM functionality critical for network operations?
DDM (Digital Diagnostic Monitoring) / DOM (Digital Optical Monitoring) lets network managers monitor live parameters such as temperature, supply voltage, laser bias, and optical output/input power. This helps engineers detect link failures and diagnose issues remotely.
Can a 1.25G SFP module work in a 10G SFP+ port?
This depends on the switch model. Many 10G SFP+ ports support dual-speed operation and can accept 1.25G modules. However, the port configuration may need to be manually locked to 1G speed (GigabitEthernet) instead of auto-negotiation.
How does Lumopt ensure compatibility across different switch brands?
Every transceiver includes EEPROM memory containing specific code parameters. We write custom compatibility profiles for major switch manufacturers like Cisco, HP, Juniper, and Huawei. We also test each transceiver on native switches during production to ensure compatibility.
What are BiDi SFP transceivers, and how do they reduce costs?
BiDi (Bidirectional) transceivers use WDM (Wavelength Division Multiplexing) to send and receive data over a single fiber strand (for example, transmitting at 1310nm while receiving at 1550nm). This allows operators to double their network capacity without running new fiber.
What certifications do your optical modules carry?
Our transceivers comply with MSA standards and carry CE, FCC, RoHS, and FDA Class 1 Laser Safety certifications. This ensures safe operation in global environments.
Do you offer industrial temperature range options?
Yes. While standard modules operate at 0°C to 70°C, we manufacture industrial-grade transceivers that operate from -40°C to +85°C. These are designed for outdoor nodes and industrial enclosures.

Long-Range & Specialized Transceivers

Engineered for extended networks and specialized applications, with configurations spanning 40km up to 160km.

1000BASE-EX SFP 1550nm 40km Duplex LC SMF

1000BASE-EX SFP 1550nm 40km Duplex LC SMF Fiber Optical Transceiver Module

View Technical Specs
1000BASE-ZX SFP 1550nm 80km DOM Duplex LC SMF

1000BASE-ZX SFP 1550nm 80km DOM Duplex LC SMF Optical Transceiver Module

View Technical Specs
1000BASE-EZX SFP 1550nm 100km Duplex LC SMF

1000BASE-EZX SFP 1550nm 100km Duplex LC SMF Optical Transceiver Module

View Technical Specs
1000BASE-EZX SFP Transceiver 1550nm 120km

1000BASE-EZX SFP Transceiver 1550nm 120km DOM Duplex LC SMF Fiber Optical Module

View Technical Specs
1000BASE-ZXC SFP Module 1550nm 160km

1000BASE-ZXC SFP Module 1550nm 160km Duplex LC SMF Fiber Optical Transceiver

View Technical Specs
1000BASE-LX/LH SFP Transceiver 1310nm 10km

1000BASE-LX/LH SFP Transceiver 1310nm 10km DOM Duplex LC SMF 1.25G Optical Module

View Technical Specs
1000BASE-SX SFP 850nm 550m DOM Duplex LC MMF

1000BASE-SX SFP 850nm 550m DOM Duplex LC MMF 1.25G Transceiver Module

View Technical Specs
1000BASE-ZX SFP 1550nm 80km Duplex LC SMF

1000BASE-ZX SFP 1550nm 80km Duplex LC SMF 1.25G Optical Transceiver Module

View Technical Specs
All 1.25G SFP Module Products