Introduction of QSFP-40G-SR4 Modules

Since the inception of the 40G Ethernet standard in 2010, QSFP+ optical modules have rapidly ascended to the forefront of 40G Ethernet applications, revolutionizing high-speed data transmission. Within the QSFP+ family, two fundamental interface specifications have emerged as cornerstones: 40GBASE-LR4 and 40GBASE-SR4. While 40GBASE-LR4 caters to the demands of single-mode applications with its precision and long-range capabilities, 40GBASE-SR4 takes center stage in multi-mode environments, offering versatility and efficiency. In this article, we delve into the intricacies of 40GBASE-SR4, particularly focusing on its pivotal role in short-distance data transmission.

What is QSFP-40G-SR4?

The QSFP-40G-SR4, standing for Quad Small Form-factor Pluggable 40 Gigabit Ethernet Short Reach 4, is a high-performance optical transceiver module used in data communication applications. This module is designed to operate over multi-mode fiber systems and supports a data rate of 40 gigabits per second (Gbps). The "SR4" designation indicates its suitability for short-reach applications. The QSFP-40G-SR4 module typically utilizes an 850 nanometer (nm) wavelength for transmitting data and incorporates multiple optical lanes for bi-directional communication. It employs parallel fiber optics technology, allowing for efficient data transmission over short distances.

The Form Factor of QSFP-40G-SR4

The 40GBASE-SR4 optical module is packaged in QSFP+, a four-channel small pluggable optical module developed to fulfill the demand for high-density, high-speed pluggable solutions. It includes 38PIN connectors, EMI shielding components, optical transceivers, heat dissipation components, copper and MTP optical cable components, and optical loopback. The QSFP-40G-SR4 (Quad Small Form-factor Pluggable 40 Gigabit Ethernet Short Reach 4) module boasts a hot-pluggable form factor, QSFP, enabling seamless insertion and removal from compatible ports without system downtime. Featuring an MPO connector receptacle, it efficiently accommodates multi-mode fiber connections.

The Features of the QSFP-40G-SR4 Module

The QSFP-40G-SR4 module boasts a range of advanced features, making it a versatile and reliable choice for high-speed networking applications.

• 1. Advanced Chip Integration: Incorporates a built-in Macom chip, ensuring efficient performance with a maximum power consumption of 1.5W.

• 2. Rigorous Testing: Thoroughly tested in targeted switches to ensure superior performance, quality, and reliability in demanding networking environments.

• 3. High-Speed Compatibility: Features a high-speed electrical interface compliant with IEEE 802.3ba standards, ensuring seamless integration into existing networks.

• 4. Real-Time Configuration: Equipped with FS BOX support for real-time configuration, enhancing ease of use and management.

• 5. Industry Compliance: Fully compliant with SFF-8436 and QSFP MSA standards, guaranteeing compatibility and reliability.

• 6. Safety and Compliance: Certified as Class 1 FDA laser safety and RoHS compliant, meeting industry safety and environmental standards.

• 7. Diagnostic Capabilities: Offers digital optical monitoring capability for strong diagnostic capabilities, facilitating network monitoring and maintenance.

Working Principle of QSFP-40G-SR4

The QSFP-40G-SR4 optical module utilizes a four-lane 850nm VCSEL array to convert electrical signals into optical signals for transmission. This enables parallel transmission, essential for high data rates. Upon reception, the photodetector array converts parallel optical signals back into electrical signals. MTP/MPO connectors efficiently handle signal reception and conversion. Additionally, the module includes digital optical monitoring for real-time parameter monitoring. Designed to integrate seamlessly with Cisco QSFP-40G-SR4 modules, it facilitates efficient and reliable high-speed data transmission. In summary, the module's principle involves parallel transmission via a VCSEL array, complemented by robust receiver mechanisms and digital diagnostics, ensuring optimal performance in networking environments.

Transmission Principle of QSFP-40G-SR4

The QSFP-40G-SR4 optical module utilizes a four-channel transmission. Initially, the electrical signal is converted to an optical signal by the laser array. Subsequently, the photodetector array transforms the parallel optical signal back into a parallel electrical signal, facilitating a seamless 40G optical connection via the MTP/MPO connector. Operating on a four-lane 850nm VCSEL array, it enables parallel data transmission, crucial for achieving high data rates. This design ensures efficient signal conversion, complemented by digital optical monitoring capabilities for real-time parameter tracking. QSFP-40G-SR4 modules seamlessly integrate into current network setups, boasting robust compatibility. They prioritize parallel transmission via VCSEL array technology and efficient receiver mechanisms, ensuring dependable, high-speed data transfer.

The Application of QSFP-40G-SR4

The QSFP-40G-SR4 module, operating at an 850nm wavelength, utilizes the MTP/MPO interface primarily for multi-mode applications. It supports transmission distances of up to 100m and 150m with OM3 and OM4 multi-mode optical fibers, respectively. This module serves to interconnect network devices within data center environments efficiently. Notably, the QSFP-40G-SR4 optical module offers versatile connectivity options. It can utilize MTP/MPO fiber jumpers to connect two 40G network devices or employ MTP/MPO to LC fiber jumpers to establish connections between 40G and 10G network equipment.

In high-speed networking environments such as data centers, enterprise networks, and telecommunications infrastructure, the QSFP-40G-SR4 module is indispensable. It seamlessly connects switches, routers, servers, and other networking equipment, facilitating fast and stable data transmission. Its compatibility with MPO connectors and ability to operate in 4x10G mode further enhances its suitability for diverse network architectures, providing flexibility and reliability in modern networking applications.

The preceding information pertains to the FS 40GBASE-SR4 optical module. Overall, the QSFP-40G-SR4 optical module is widely favored for short-range uses in 40G networks.