
discussion on the definition of Q, its practical applications, and its experimental
determination may be found in a publication by Bergano et al. [39]. In addition, the
same set up was used to show error-free transmission for 65 ps of added differential
group delay (DGD) at a data rate of 40 Gb/s.
Until just a few years ago, forward error correction (FEC) was utilized solely in
high-end submarine transmission systems. There are several FEC schemes that
have been demonstrated to date, and most of them are proprietary. Recently, ITU
has approved G.975.1 (02/2004), the implementation of FEC in DWDM systems.
The on-PIC VOA allows one to correct, within ...