Nokia series

Nokia 3HE15274AA

Product description: Nokia 3HE15274AA _400GBase-DR4+ QSFP-DD Transceiver (SMF, 1310nm, MPO, 2km, DOM)_liyuan tech
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Manufacturer: Nokia
Part Number: 3HE15274AA
CLEI: INUIAHDHAA
Speed Description: 400-Gigabit
Form Type: QSFP-DD
Reach: 2km
Wvelength: 1310nma
Transceiver Type: DR4+
Media: SMF
Connector: MPO
DOM: DOM
Nokia 3HE15274AA 400G optical module, detailed product description
400G: It means that the data transmission rate of this module is 400 Gigabit Ethernet, that is, 400 gigabits of data are transmitted per second. This is one of the mainstream rates for high-speed interconnection in current data centers.
DR4: This is the most important optical interface standard.
D stands for "Distance", usually referring to the transmission distance on single-mode optical fibers.
R: Stands for "4x" or "4 lanes", indicating that it uses four independent channels (wavelengths).
It is clear that there are four channels. DR4 employs coarse wavelength division multiplexing technology to multiplex four different wavelengths (typically within the range of 1295 to 1310nm) onto a single single-mode optical fiber for transmission.
At the same time, they are demultiplexed at the receiving end. This means that it requires the MPO-12/APC connector to achieve one transmission and one reception.
QSFP-DD: This is the package form of the module.
QSFP: Quad Small Form-factor Pluggable.
DD: Double Density. It adds a second row of contacts to the standard QSFP size, doubling the interface density and thus supporting higher rates (such as 400G, 800G). It is backward compatible with switches of ports such as QSFP28 (100G) and QSFP56 (200G).
1310nm: This is the central wavelength of the optical signal. The DR4 standard employs four wavelengths, typically around 1295.56, 1300.05, 1304.58, and 1309.14 nm, all concentrated in the O-band (1310nm window). This band has the least dispersion in optical fibers and is suitable for medium and short-distance transmission.
2km: The maximum transmission distance of the module. This is an optimized distance, which is highly suitable for connections between buildings within a data center campus or between different machine buildings within a data center.
MPO: Refers to the type of optical fiber interface connector of the module. The DR4 module must use the MPO (Multi-fiber Push-On) connector, specifically the MPO-12 interface, which has 12 optical fibers inside (4 of which are used for transmitting signals).
Four are for receiving signals, and the rest are either spare or vacant. It should be noted that the MPO connectors used for DR4 typically have physical contact at the APC Angle to minimize reflection, which is different from the UPC connectors of multi-mode modules.
OM optical fiber: There might be a common point of confusion here. DR4 is a module designed for single-mode optical fibers. The "OM" mentioned in the product description is very likely to refer to its compatibility with OM4/OM5 multimode optical fibers
However, the transmission distance will be significantly shortened (possibly only 100 to 150 meters). It can reach the nominal 2 kilometers on single-mode optical fibers. When purchasing and using, you must confirm the type of your optical fiber.
Summary description: The Nokia 3HE15274AA is a 400G optical module in QSFP-DD packaging form, adhering to the DR4 standard. It transmits data on single-mode optical fibers using four wavelengths of approximately 1310nm through coarse wavelength division multiplexing technology.
The maximum transmission distance can reach up to 2 kilometers. It uses MPO-12/APC optical fiber connectors and is mainly applied to the interconnection of high-speed data center networks.
Usage scenarios
The core application scenario of this module is very clear: high-speed data center networks.
Data center Spine-Leaf architecture interconnection:
In the Clos network architecture of modern data centers, extremely high bandwidth is required between Leaf switches and Spine switches. The 400G DR4 module is an ideal choice for connecting these core device nodes and is used to build high-speed, low-latency backbone networks.
2. Data Center Interconnection
It is used to connect different data center buildings within the same park or adjacent data centers. The 2km transmission distance perfectly meets the interconnection needs of the park area and provides a high-bandwidth data transmission channel.
3. High-speed server access
With the development of AI/ML and high-performance computing, high-end GPU servers and storage arrays have begun to be equipped with 400G network cards. These servers can be directly connected to the Leaf switch via the DR4 module to enjoy ultra-low latency and ultra-high bandwidth.
4. Interconnection between routers and core network devices:
It is used to connect high-performance core routers or large switching platforms as their 400G Ethernet service ports.
In addition to Nokia 3HE15274AA , Liyuan Tech supply a wide range of other Nokia Series . If you have any need or interest, please feel free to send inquiry to global@chn-liyuan.com

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