2X100G QSFP-DD CWDM4 Optical Transceiver Module (1271nm 1291nm 1311nm 1331nm CS SMF 2km DDM)
2x100G QSFP-DD CWDM4 optical transceiver modules are suitable for data centers and HPC (High-Performance Computing) links up to 2km over single-mode fiber. It also features outstanding BER and high sensitivity because of its reliable design and excellent coupling efficiency.
Product Details
| Product Number | QSFP-DD-200G-CWDM4 | Vendor Name | Walsun |
| Form Factor | QSFP-DD | Max Data Rate | 212.5Gbps |
| Wavelength | 1271nm, 1291nm, 1311nm, 1331nm | Max Distance | 2km |
| Connector | Duplex CS | Voltage Supply | 3.3V |
| Cable Type | SMF | DDM Support | Yes |
| Transmitter Type | 8 x CWDM Uncooled DFB Laser | Receiver Type | PIN |
| TX Power | Each Lane | Receiver Sensitivity | < -11.5dBm |
| Operation Temperature | 0 to 70°C (32 to 158°F) | Maximum Power | < 7W |
| Protocols | IEEE 802.3bm/100G CWDM4 MSA, QSFP-DD MSA Type 2 |
Application | 100G Ethernet |
200G Transceivers Q&A
Q:What are the benefits of moving to 200G technology
A:Walsun’s 200G/port systems allow datacenters and high-performance computing environments to meet growing bandwidth needs at lower cost and power per gigabit. Key benefits include: ? Increase in bandwidth density by a factor of 2 when compared to 100G/port systems.
- Easy connectivity to compute nodes and Network Interface Cards (NICs) that use 50Gb/s PAM-4 per lane. NICs are transitioning from using 10G/25G SFP to 50G SFP ports, and from 100G QSFP28 ports to 100G-2 / 200G-4 QSFP56 ports.
- Upgrade leaf-to-spine links from 100G to 200G with no change to existing fiber plant. ? Reduce the number of optical fiber links, connectors and patch panels by a factor of 2 when compared to 100G/port platforms.
Q:Can 100G links be upgraded to 200G links without changing optical fiber type or connectors?
A:Yes, if the 100G links use either of the following types of fiber, then the links can be upgraded to 200G without changing any of the underlying fiber connectivity:
i) Duplex single mode fiber with a max length of 2km, or
ii) Parallel multimode fiber, with a max length of 70m for OM3, or 100m for OM4 fiber.
The QSFP-200G-FR4 uses the same fiber type and connectors (duplex LC UPC/PC, SMF) as all Walsun 100G duplex SMF optics (such as 100G-CWDM4, 100G-LR4/LRL4, 100G-DR/FR/LR), enabling simple 100G-to-200G upgrade with no change to fiber plant or connectors, provided the fiber lengths are 2km or less. This is illustrated in the diagram below.
Upgrade 100G SMF duplex links to 200G with no change to fiber plant
The QSFP-200G-SR4 uses the same fiber type and connectors (MPO-12 UPC/PC, parallel MMF) as the 100GSR4/XSR4, enabling simple 100G-to-200G upgrade with no change to fiber plant or connectors, provided the fiber lengths are less than 70m/100 for OM3/OM4 fiber. This is illustrated in the diagram below
Upgrade 100G parallel MMF links to 200G with no change to fiber plant
Q:Are there any 200G transceivers that allow the use of standard duplex multi-mode fiber?
A:No. There is no industry standard for 200G over duplex MMF. For operation over MMF, Walsun offers the QSFP200G-SR4, which uses parallel multimode optical fiber using an MPO-12 optical connector – i.e. the same fiber type and fiber connector as used for 100-SR4. It is possible to use the Walsun QSFP-100G-SRBD or QSFP-100GSWDM4 in any Walsun QSFP200 port for operation over duplex fiber at 100G.
Q:Can Walsun 100G QSFPs be used in Walsun 200G QSFP switch ports?
A:Yes, Walsun 100G QSFP transceivers will be detected and enabled upon insertion into Walsun switches. All Walsun 200G QSFP ports are capable of being configured for 100G.
Q:Can Walsun 200G QSFPs be used in Walsun 100G QSFP switch ports?
A:No – Walsun 200G QSFPs should only be used in 200G QSFP ports, or QSFP-DD ports that are configured to operate in 200G mode.
Q:Can 200G QSFP copper cables be used for 100G connectivity?
A:Yes, Walsun 200G QSFP copper cables can be used for 100G, but not vice versa.
