1. Product Overview

The 25G SFP28 LR is a high-performance bidirectional SFP28 optical transceiver module designed for 25G Ethernet applications. It supports data rates up to 25.78 Gbps over single-mode fiber with a transmission distance of up to 15 km. This optical module integrates advanced DML laser technology and a PIN/TIA receiver, ensuring low power consumption and high reliability. It is ideal for data centers, enterprise networks, and high-speed computing environments.

2. 25G SFP28 LR Key Features

• Data rates up to 25.78 Gbps
• 15 km transmission over single-mode fiber
• Low power consumption (< 1.4W)
• Single 3.3V power supply
• Digital Diagnostic Monitoring (DDM) via SFF-8472
• Hot-pluggable SFP28 form factor
• Industrial temperature range support (-40°C to +85°C)
• RoHS compliant

3. 25G SFP28 LR Technology & Standards

This optical transceiver module complies with SFP28 MSA, SFF-8431, SFF-8432, and SFF-8472 standards. It features built-in Clock and Data Recovery (CDR) on both Tx and Rx paths, ensuring low jitter and high signal integrity. The device uses a DML laser and PIN photodiode with TIA for superior optical performance.

4. 25G SFP28 LR Working Principle

The optical module operates on a bidirectional (BIDI) principle, using two different wavelengths (1270/1330 nm or 1330/1270 nm) for transmit and receive over a single fiber strand. Internal CDR circuits retime and reshape the electrical signals, reducing jitter and improving BER performance. The digital diagnostics controller continuously monitors key parameters such as temperature, optical power, and bias current.

5. Applications

• Data center interconnects and backbone networks
• 25G Ethernet switches and routers
• High-performance computing and storage area networks
• Telecom and enterprise infrastructure

6. Specifications

7. Advantages

• Long reach of 15 km with single-mode fiber
• Low power design reduces operational costs
• Industrial temperature range for harsh environments
• Integrated CDR for improved signal quality
• Full digital diagnostics for real-time monitoring

8. Service & Support

We offer a 5-year warranty on all optical transceiver modules. Technical support is available 24/7. Custom labeling and compatibility testing services are provided. Bulk orders are supported with competitive pricing and fast turnaround.

9. Frequently Asked Questions

Q: What is the difference between PMM561L and PMM651L?
A: They use different wavelength pairs: 1270/1330 nm vs. 1330/1270 nm.

Q: Is this optical module compatible with Cisco switches?
A: Yes, it is compatible with most standard SFP28 ports. Please check datasheet for specific models.

Q: Does it support Digital Diagnostic Monitoring?
A: Yes, full DDM is supported via the SFF-8472 protocol.

10. Precautions

• Avoid exposing the optical port to dust or contaminants.
• Ensure proper ESD handling during installation.
• Verify host device compatibility before purchase.
• Do not exceed maximum operating temperature.

11. Company Introduction

With over a decade of industry experience, China Cloud Electro Optics Technology Co., Ltd. operates a large manufacturing facility supported by a strong R&D team. We specialize in high-quality optical transceiver modules and networking hardware, serving a global clientele. Our product portfolio includes original equipment from leading brands such as Mellanox, Ruckus, Aruba, and Extreme. We maintain extensive inventory and provide competitive pricing, reliable delivery, and round-the-clock technical support.