The WDM offerings in SFP28 have hit the market!
Hot on the heels of our introduction to the 80km SFP28 ZR 25G optics, there’s even more news about the SFP28 format!
For MSOs and Telcos Wavelength Division Muliplexing (WDM) is well known. Course Wavelength Division Multiplexing or CWDM offers up to 18 channels over a fiber pair while Dense Wavelength Division Multiplexing (DWDM) can offer an excess of 40 channels. There are so many ways that passive optical filters can be used to make the most of the existing fiber.
Breaking News from Integra Optics: the WDM offerings in SFP28 are coming to market!
Right now, 10km and 20km CWDM SFP28 Optics are available in enough channels to start utilizing them as an upgrade path (see table below) with the complete channel map under industry development
| CWDM SFP28 25G Channels | |||
| Wavelength | Rate | 10km | 20km |
| 1271nm | SFP28 25G/10GE | CI | CI |
| 1291nm | SFP28 25G/10GE | CI | CI |
| 1311nm | SFP28 25G/10GE | CI | CI |
| 1331nm | SFP28 25G/10GE | CI | CI |
| 1351nm | SFP28 25G/10GE | CI | C |
| 1371nm | SFP28 25G/10GE | CI | C |
| 1391nm | SFP28 25G/10GE | - | - |
| 1411nm | SFP28 25G/10GE | - | - |
| 1431nm | SFP28 25G/10GE | - | - |
| 1451nm | SFP28 25G/10GE | - | - |
| 1471nm | SFP28 25G/10GE | CI | CI |
| 1491nm | SFP28 25G/10GE | CI | CI |
| 1511nm | SFP28 25G/10GE | CI | - |
| 1531nm | SFP28 25G/10GE | CI | - |
| 1551nm | SFP28 25G/10GE | CI | - |
| 1571nm | SFP28 25G/10GE | CI | - |
| 1591nm | SFP28 25G/10GE | - | - |
| 1611nm | SFP28 25G/10GE | - | - |
These optics will work with your current passive filters that are currently carrying 10G CWDM channels, making incremental upgrades simple. Each of these offerings are available in C-Temp (0~70c) and I-Temp (-40 ~ 85c)
And in the matter of some serious bandwidth potential, there’s a full complement of DWDM SFP28s at 10km.
| Channel | Rate | 10km | Channel | Rate | 10km | |
| 21 | SFP28 25G DWDM | CI | 41 | SFP28 25G DWDM | CI | |
| 22 | SFP28 25G DWDM | CI | 42 | SFP28 25G DWDM | CI | |
| 23 | SFP28 25G DWDM | CI | 43 | SFP28 25G DWDM | CI | |
| 24 | SFP28 25G DWDM | CI | 44 | SFP28 25G DWDM | CI | |
| 25 | SFP28 25G DWDM | CI | 45 | SFP28 25G DWDM | CI | |
| 26 | SFP28 25G DWDM | CI | 46 | SFP28 25G DWDM | CI | |
| 27 | SFP28 25G DWDM | CI | 47 | SFP28 25G DWDM | CI | |
| 28 | SFP28 25G DWDM | CI | 48 | SFP28 25G DWDM | CI | |
| 29 | SFP28 25G DWDM | CI | 49 | SFP28 25G DWDM | CI | |
| 30 | SFP28 25G DWDM | CI | 50 | SFP28 25G DWDM | CI | |
| 31 | SFP28 25G DWDM | CI | 51 | SFP28 25G DWDM | CI | |
| 32 | SFP28 25G DWDM | CI | 52 | SFP28 25G DWDM | CI | |
| 33 | SFP28 25G DWDM | CI | 53 | SFP28 25G DWDM | CI | |
| 34 | SFP28 25G DWDM | CI | 54 | SFP28 25G DWDM | CI | |
| 35 | SFP28 25G DWDM | CI | 55 | SFP28 25G DWDM | CI | |
| 36 | SFP28 25G DWDM | CI | 56 | SFP28 25G DWDM | CI | |
| 37 | SFP28 25G DWDM | CI | 57 | SFP28 25G DWDM | CI | |
| 38 | SFP28 25G DWDM | CI | 58 | SFP28 25G DWDM | CI | |
| 39 | SFP28 25G DWDM | CI | 59 | SFP28 25G DWDM | CI | |
| 40 | SFP28 25G DWDM | CI | 60 | SFP28 25G DWDM | CI |
These channels are versatile and available in commercial and industrial temperature ratings as well!
The icing on the DWDM cake is that the lineup includes the I-Temp DWDM SFP28 25G Tunable transceiver that covers channels 14 through 61 up to 20km, making it an easy sparing solution and the most nimble deployment stock.
If you have local distributions of cell towers, POPs, or hubs these are a dream come true as a way to easily upgrade to more than double the bandwidth of your 10G network links.
This is just another way that SFP28 as moving to challenge the SFP+ for the title of most prolific format!