Shenzhen, China, August 30, 2021 − GIGALIGHT's today launched an 8-channel 400G QSFP56-DD passive direct-attached cable (PCC) assembly that supports 3m transmission, marking its successful return to the technology track of DAC products.
The newly developed 400G QSFP56-DD PCC assembly can reach a maximum transmission distance of 3m, the insertion loss is better than 17.16dB@13.28GHz, the Pre-FEC bit error ration is better than average 1E-8, and the Post -FEC bit error ration is better than 1E-14 level, showing superior consistency of each channel.
(Partial testing diagram of 400G DACs)
| Case A | CH1 | CH2 | CH3 | CH4 | CH5 | CH6 | CH7 | CH8 |
|---|---|---|---|---|---|---|---|---|
| PreBER | 1.02E-08 | 4.79E-08 | 3.65E-08 | 9.09E-09 | 2.11E-08 | 8.39E-09 | 7.56E-08 | 5.03E-07 |
| PostBER | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Margin | 71 | 43 | 43 | 43 | 57 | 71 | 57 | 43 |
Table ：400G QSFP56-DD 3m DAC Case A
| Case B | CH1 | CH2 | CH3 | CH4 | CH5 | CH6 | CH7 | CH8 |
|---|---|---|---|---|---|---|---|---|
| PreBER | 2.26E-09 | 9.72E-09 | 2.88E-09 | 1.30E-08 | 1.82E-08 | 2.68E-09 | 1.99E-08 | 2.72E-07 |
| PostBER | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Margin | 71 | 71 | 57 | 43 | 71 | 71 | 71 | 57 |
Table 2：400G QSFP56-DD 3m DAC Case B
GIGALIGHT has started the R&D and production of passive DAC assemblies since 2011 and gained a large amount of customers of Passive DAC products worldwide. Through 10 years of technological innovation and practice, the company has completely solved the compliance problem of COM computing software & hardware and protocols, and has endowed high-density DACs with a set of efficient and reliable manufacturability procedures.
Over the years of R & D, GIGALIGHT has a complete family of DAC and its branch products:
| Product name | Protocol | Maximum insertion loss | Transmission distance |
|---|---|---|---|
| 10G SFP+ PCC | IEEE 802.3ae | 17.04dB@5.16GHz | 7m |
| 25G SFP28 PCC | IEEE 802.3by | 22.48dB@12.89GHz | 5m |
| 40G QSFP PCC | IEEE 802.3ba | 17.04dB@5.16GHz | 5m |
| 100G QSFP28 PCC | IEEE 802.3bj | 22.48dB@12.89GHz | 5m |
| 200G QSFP56 PCC | IEEE 802.3cd | 17.16dB@13.26GHz | 3m |
| 400G QSFP-DD PCC | IEEE 802.3cd | 17.16dB@13.26GHz | 3m |
Table 3: GIGALIGHT DAC and branch product family
As an open optical network device explorer, GIGALIGHT integrates the design, manufacturing and sales of active and passive optical components and subsystems, and provides customers with comprehensive and innovatively designed high-speed optical interconnection hardware solutions. The product lines cover optical transceivers, passive optical components, coherent optical modules and subsystems. The key range of services include data centers, 5G bearer networks, metro WDM transmission, ultra-high-definition broadcast video and other application fields.
