Several types of optical fibers are recommended by ITU-T. Recommendations are as follows.
ITU-T
Recommendation |
Type |
Category |
Transmission Wavelength Band |
Our Products |
G.651.1 |
Multi-mode Fiber (MMF) |
Graded-index MMF |
850 and/or 1300 nm region |
- |
G.652 |
Single-mode Fiber (SMF) |
Standard SMF |
1260-1625 nm |
PureBand series
PureAccess series
|
G.653 |
Dispersion Shifted Fiber (DSF) |
1550 nm region |
- |
G.654 |
Cutoff Shifted Fiber |
1530-1625 nm |
PureAdvance series
Z Fiber series
|
G.655 |
Non-Zero Dispersion Shifted Fiber (NZDSF) |
1460-1565 nm |
- |
G.656 |
Wideband NZDSF |
1460-1625 nm |
- |
G.657 |
Bending-Loss Insensitive SMF |
1260-1625 nm |
PureBand-R
PureBand-Plus
PureAccess series
|
(ITU-T: International Telecommunication Union – Telecommunication Standardization Sector)
Sumitomo Electric’s product lineup offers a wide range of optical fibers complying with various ITU-T Recommendations e.g. G.652, G.657, and G.654.
ITU-T G.652:
ITU-T G.652 SMFs are the most widely used optical fiber in the world. G.652.B is the base category of G.652. G.652.D has similar characteristics with G.652.B, but also has reduced water peak attenuation around 1380 nm to allow transmissions in the extended wavelength of 1260-1625 nm.
Sumitomo Electric’s standard SMFs,
PureBand series and PureAccess series are compliant with ITU-T G.652.D.
ITU-T G.657:
ITU-T G.657 fibers have improved bending loss performances compared with ITU-T G.652 fibers. These fibers can be used for many applications where the space is limited and bend optimized cabling is advantageous, e.g., datacenter, FTTH, access, and metro networks.
Subcategories G.657.A1 and G.657.A2 are appropriate for a minimum bending radius of 10 and 7.5 mm, respectively. These fibers are also upward compatible with ITU-T G.652.
Sumitomo Electric’s bend insensitive fibers,
PureBand-R, PureBand-Plus and PureAccess series are compliant with ITU-T G.657.A1 or G.657.A2.
ITU-T G.654:
ITU-T G.654 fibers are loss-minimized and cut-off shifted at a 1550 nm wavelength region, and optimized for use in the 1530-1625 nm region. The very low loss G.654 fibers can be used for long distance transmission applications, including submarine cable systems and long-haul terrestrial systems.
G.654.B has a large MFD compared to G.654.A and G.654.C, and can be applied to long distance and large capacity WDM transmission systems. G.654.D has a yet larger MFD to further improve the optical signal to noise ratio (OSNR) characteristics. G.654.E is optimized for high bit-rate coherent transmission in terrestrial long-haul systems.
Sumitomo Electric’s ultra-low loss submarine fibers,
Z Fiber series is compliant with ITU-T G.654.B, G.654.C, or G.654.D.
Sumitomo Electric’s ultra-low loss terrestrial long-haul fibers,
PureAdvance series is compliant with ITU-T G.654.E.