The 40Gbps QSFP+ SR4 Optical Transceiver is designed for short-range data communication over multimode fiber (MMF) up to 100 meters using OM3 fiber and 150 meters with OM4 fiber. It supports four independent transmit and receive channels, each capable of a data rate of 10Gbps, resulting in an aggregate bandwidth of 40Gbps. The module integrates an MTP/MPO connector, ensuring efficient signal alignment and transmission, and operates on a single +3.3V power supply with a maximum power consumption of 1.5W. Compliant with QSFP+ MSA standards, this transceiver is ideal for data center interconnects, Infiniband QDR/DDR/SDR, and 40G Ethernet applications.
The module employs VCSEL laser technology for transmission and PIN photodetectors for reception, with data signals internally terminated to Common Mode Logic (CML) levels. It supports advanced features like digital diagnostic monitoring via a 2-wire serial interface, enabling real-time tracking of parameters such as temperature, voltage, and optical power. Designed for robust performance in commercial environments, the QSFP+ SR4 offers enhanced functionality while adhering to environmental standards, including RoHS compliance, making it a reliable choice for high-density and high-performance networking systems.
This parallel full-duplex module integrates 4 transmit and 4 receive lanes, each operating up to 10.3125 Gbps for an aggregate 40Gbps link. It complies with IEEE 802.3ba 40GBASE-SR4, QSFP+ MSA (SFF-8436), and Infiniband standards. Designed for OM3 MMF up to 100 m, it uses a 12-fiber MPO/MTP connector. Typical power consumption is 1.5 W on a single 3.3 V supply, with an operating case temperature range of 0 °C to +70 °C. Integrated digital diagnostics monitoring provides real-time parameter tracking.
Key Parameters
| Specification | Value | Notes |
|---|---|---|
| Form factor / connector | QSFP+ (hot-pluggable), MPO/MTP 12-fiber | Parallel MMF |
| Aggregate bandwidth | 40 Gbps (4 × 10.3125 Gbps lanes) | Per IEEE 802.3ba |
| Reach (OM3 fiber) | Up to 100 m | At 40G |
| Tx wavelength | 840 – 860 nm (850 nm nominal) | VCSEL array |
| Spectral width (RMS) | ≤ 0.65 nm | — |
| Tx optical power | −8 to +1 dBm | Per lane average |
| OMA (each lane) | −6 to +3 dBm | — |
| Extinction ratio | ≥ 3 dB | — |
| Tx off power | ≤ –30 dBm | — |
| Receiver type | PIN photodiode array | — |
| Receiver sensitivity | ≤ −13 dBm | BER ≤ 1E−12 |
| Stressed sensitivity | ≤ −5.4 dBm (OMA) | IEEE spec |
| Receiver overload | +1 dBm max | Per lane |
| LOS assert/de-assert | −30 dBm / −14 dBm | 0.5 dB hysteresis |
| Supply voltage | 3.1 – 3.5 V | Single 3.3 V |
| Power consumption | ≤ 1.5 W | Typ. ~1.0 W |
| Diagnostics | Temp., bias, Tx/Rx power, Vcc | Digital diagnostics (DDMI) |
| Operating case temp. | 0 °C to +70 °C | Commercial |
| Compliance | IEEE 802.3ba 40GBASE-SR4, QSFP+ MSA, Infiniband, RoHS, EN 60825 Class 1 | Standards compliant |
At Carritech, we pride ourselves on our exceptional service and commitment to meeting our customers’ needs. Our extensive range of SFP transceivers is designed to cater to various requirements, ensuring that you receive the best solutions for your projects. We understand the importance of timely delivery, and our efficient processes are geared towards providing you with the products you need as quickly as possible. Our dedicated team works tirelessly to ensure that your orders are processed and dispatched promptly, so you can rely on us for swift and reliable service.
We recognise that every project is unique, and our flexible approach allows us to adapt to your specific needs. Whether you require immediate delivery or have more complex requirements, we are here to support you every step of the way. Our commitment to customer satisfaction means that we go above and beyond to ensure that you receive your SFP transceivers in a timely manner, without compromising on quality. Trust Carritech to deliver the solutions you need, when you need them.
At Carritech Optics, we stand by the quality and reliability of our optical transceivers. That’s why we proudly offer a lifetime warranty on all products as a testament to our commitment to excellence and customer satisfaction.
Our lifetime warranty provides comprehensive coverage for the entire lifecycle of your optical transceivers, ensuring you experience complete peace of mind when choosing Carritech Optics. The warranty covers:
Should you ever need to make a warranty claim, our team is here to assist you. Simply contact our support team with your product details, and we’ll guide you through a quick and hassle-free process to resolve the issue.
Carritech Optics is dedicated to providing high-quality optical solutions that you can trust for the long haul. With our lifetime warranty, you can confidently invest in our products, knowing that we’re with you every step of the way.
Carritech’s Opticode is an advanced transceiver programming solution that gives you complete flexibility across your optical network. Designed to ensure seamless compatibility with a wide range of OEM systems, Opticode allows you to quickly reconfigure transceivers to meet your specific requirements. The result is greater control, reduced costs, and a more adaptable, future-proof infrastructure.
Intuitive interface allows you to reprogram transceivers quickly, without complex processes or specialist training.
Reprogram transceivers to work reliably across a wide range of OEM systems.
Gain the flexibility to adapt, optimise, and scale your optical infrastructure with confidence.
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