NOVEMBER 29, 2009 -- Gigalight has released a new series of WDM products. The WDM series includes CWDM, WDM isolator hybrid, FWDM 1310/1490/1550, CWDM mux/demux module, and optical add/drop module.
They are based on Gigalight’s ultra low-loss thin-film filter (TFF) technology whereby an optical multilayer TFF is used to produce the desired transmission wavelength of light. The all-glass packaged WDM device can be designed into a small footprint as the filter is independent of the fiber’s parameters, Gigalight says.
Gigalight also site additional advantages:
- wavelength flat performance
- polarization insensitive
- low insertion loss
- high isolation
- high directivity
- good wavelength temperature within 0.001 nm/℃.
CWDM technology uses 2002 ITU-standard 20-nm spacing between the wavelengths, from 1270 nm to 1610 nm. Because their wavelengths are relatively far apart compared to DWDM, CWDM transponders, lasers, and filters are generally not very expensive, Gigalight asserts. CWDM is often used as a low-cost access technology for metro networks. Its main applications are for such CWDM systems, as well as PON systems and CATV links.